# Greetings from The On-Line Encyclopedia of Integer Sequences! http://oeis.org/ Search: id:a257257 Showing 1-1 of 1 %I A257257 #11 Apr 30 2015 21:45:07 %S A257257 2,2,6,2,6,14,2,6,16,24,2,6,14,28,44,2,6,16,26,48,60,2,6,14,28,48,60, %T A257257 84,2,6,16,24,52,64,86,122,2,6,14,26,48,66,94,126,142,2,6,16,28,48,62, %U A257257 86,132,144,176,2,6,14,26,44,60,94,120,146,166,216,2,6,16,24,48,64,86,132,142,180,234,252 %N A257257 Square array A(row,col) = A255127(row,col+1) - A255127(row,col): the first differences of each row of Ludic array. %C A257257 The array A(row,col) is read by downwards antidiagonals as A(1,1), A(1,2), A(2,1), A(1,3), A(2,2), A(3,1), ... %H A257257 Antti Karttunen, Table of n, a(n) for n = 1..10440; the first 144 antidiagonals of the array %F A257257 A(row,col) = A255127(row,col+1) - A255127(row,col). %F A257257 A(row,col) = 2*A257258(row,col). %e A257257 The top left corner of the array: %e A257257 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2 %e A257257 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6 %e A257257 14, 16, 14, 16, 14, 16, 14, 16, 14, 16, 14, 16, 14, 16, 14 %e A257257 24, 28, 26, 28, 24, 26, 28, 26, 24, 28, 26, 28, 24, 26, 28 %e A257257 44, 48, 48, 52, 48, 48, 44, 48, 52, 48, 48, 48, 44, 52, 48 %e A257257 60, 60, 64, 66, 62, 60, 64, 62, 60, 70, 60, 60, 62, 64, 60 %e A257257 84, 86, 94, 86, 94, 86, 82, 92, 88, 92, 88, 90, 90, 84, 90 %e A257257 122, 126, 132, 120, 132, 126, 130, 126, 120, 132, 128, 126, 130, 128, 126 %e A257257 142, 144, 146, 142, 146, 138, 150, 148, 140, 148, 146, 138, 150, 138, 150 %e A257257 176, 166, 180, 168, 176, 178, 170, 178, 170, 180, 174, 172, 176, 178, 176 %e A257257 216, 234, 226, 242, 228, 226, 240, 218, 234, 246, 220, 230, 234, 226, 234 %e A257257 252, 270, 254, 274, 258, 254, 258, 276, 262, 266, 258, 256, 264, 276, 264 %e A257257 274, 284, 268, 284, 304, 270, 282, 278, 294, 282, 282, 276, 282, 288, 292 %e A257257 308, 316, 314, 316, 320, 316, 312, 308, 324, 336, 316, 302, 316, 314, 322 %e A257257 360, 360, 354, 368, 360, 372, 370, 368, 352, 360, 380, 354, 370, 380, 352 %e A257257 412, 434, 424, 420, 426, 440, 426, 420, 432, 424, 422, 444, 424, 422, 430 %e A257257 ... %o A257257 (Scheme) %o A257257 (define (A257257 n) (A257257bi (A002260 n) (A004736 n))) %o A257257 (define (A257257bi row col) (- (A255127bi row (+ 1 col)) (A255127bi row col))) ;; Code for A255127bi given in A255127. %Y A257257 Column 1: A256482. %Y A257257 Cf. A255127. %Y A257257 Cf. A257258 (same array but with terms divided by 2). %Y A257257 Cf. also arrays A257251 and A257255. %K A257257 nonn,tabl %O A257257 1,1 %A A257257 _Antti Karttunen_, Apr 19 2015 # Content is available under The OEIS End-User License Agreement: http://oeis.org/LICENSE