This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A205392 #5 Mar 30 2012 18:58:11 %S A205392 1,4,3,7,6,3,12,11,8,5,17,16,13,10,5,24,23,20,17,12,7,31,30,27,24,19, %T A205392 14,7,40,39,36,33,28,23,16,9,49,48,45,42,37,32,25,18,9,60,59,56,53,48, %U A205392 43,36,29,20,11,71,70,67,64,59,54,47,40,31,22,11,84,83,80,77 %N A205392 Ordered differences of numbers s(j)=ceiling(j^2/2). %C A205392 For a guide to related sequences, see A204892. %e A205392 a(1)=s(2)-s(1)=2-1=1 %e A205392 a(2)=s(3)-s(1)=5-1=4 %e A205392 a(3)=s(3)-s(2)=5-2=3 %e A205392 a(4)=s(4)-s(1)=8-1=7 %e A205392 a(5)=s(4)-s(2)=8-2=6 %t A205392 (See the program at A205394.) %Y A205392 Cf. A205394, A204892. %K A205392 nonn %O A205392 1,2 %A A205392 _Clark Kimberling_, Jan 27 2012