# Greetings from The On-Line Encyclopedia of Integer Sequences! http://oeis.org/ Search: id:a031883 Showing 1-1 of 1 %I A031883 #14 Jul 13 2015 22:38:54 %S A031883 2,4,2,4,2,6,4,6,2,4,6,6,2,12,4,2,4,2,4,8,6,6,6,6,4,12,2,4,2,6,10,8,4, %T A031883 6,2,18,4,2,6,4,6,8,4,8,4,2,4,18,2,6,6,10,2,4,8,6,4,12,2,6,4,8,10,8,4, %U A031883 6,18,6,2,6,10,6,6,6,2,4,18,12,12,2,6,4,2,6,16,6,2,10,6,2,4,12,6,18,2,4,8 %N A031883 First differences of lucky numbers. %C A031883 a(n) = A254967(n,n-1). - _Reinhard Zumkeller_, Feb 11 2015 %H A031883 T. D. Noe, Table of n, a(n) for n=1..10000 %t A031883 lst = Range[1, 600, 2]; i = 2; While[ i <= (len = Length@lst) && (k = lst[[i]]) <= len, lst = Drop[lst, {k, len, k}]; i++ ]; Rest@lst - Most@lst (* _Robert G. Wilson v_, May 12 2006 *) %o A031883 (Haskell) %o A031883 a031883 n = a031883_list !! (n-1) %o A031883 a031883_list = zipWith (-) (tail a000959_list) a000959_list %o A031883 -- _Reinhard Zumkeller_, Feb 11 2015 %Y A031883 Cf. A000959. %Y A031883 Cf. A254967. %K A031883 nonn,easy %O A031883 1,1 %A A031883 _Patrick De Geest_ # Content is available under The OEIS End-User License Agreement: http://oeis.org/LICENSE