# Greetings from The On-Line Encyclopedia of Integer Sequences! http://oeis.org/ Search: id:a252316 Showing 1-1 of 1 %I A252316 #4 Dec 16 2014 17:29:22 %S A252316 4197,1918,2493,6011,18820,62915,214325,735703,2536027,8732521, %T A252316 30044845,103433765,356211933,1226556113,4222869979,14539252073, %U A252316 50061142569,172368826263,593481176363,2043402198747,7035653625011,24224571440057 %N A252316 Number of (n+2)X(3+2) 0..3 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 0 1 3 6 or 7 %C A252316 Column 3 of A252321 %H A252316 R. H. Hardin, Table of n, a(n) for n = 1..210 %F A252316 Empirical: a(n) = a(n-2) +13*a(n-3) +46*a(n-4) +89*a(n-5) +125*a(n-6) +81*a(n-7) -32*a(n-8) -87*a(n-9) -78*a(n-10) -9*a(n-11) +68*a(n-12) +41*a(n-13) -53*a(n-14) -131*a(n-15) -95*a(n-16) +24*a(n-17) +84*a(n-18) +78*a(n-19) +8*a(n-20) -81*a(n-21) -87*a(n-22) -36*a(n-23) +6*a(n-24) +14*a(n-25) +8*a(n-26) +4*a(n-27) for n>34 %e A252316 Some solutions for n=4 %e A252316 ..3..3..3..3..3....3..3..3..2..3....3..3..3..3..3....3..3..3..3..3 %e A252316 ..3..2..3..3..2....2..3..3..3..3....3..2..3..3..3....3..3..2..3..3 %e A252316 ..3..3..3..3..3....3..3..2..3..3....3..3..3..3..3....2..3..3..3..2 %e A252316 ..2..3..3..3..3....3..3..3..3..3....3..3..3..3..3....3..3..3..3..3 %e A252316 ..3..3..3..2..3....3..3..3..3..3....3..3..3..3..3....3..2..3..3..3 %e A252316 ..3..3..3..3..3....2..3..3..3..3....2..3..3..2..3....3..3..3..3..3 %K A252316 nonn %O A252316 1,1 %A A252316 _R. H. Hardin_, Dec 16 2014 # Content is available under The OEIS End-User License Agreement: http://oeis.org/LICENSE