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 A056222 #12 Jul 16 2024 15:55:52
%S A056222 -1,1,-1,4,-6,16,-17,34,-24,84,-98,273,-194,449,-209,1089,-726,2695,
%T A056222 -1295,5049,-990,10044,-3125,23335,-2936,40516,3052,82874,3553,171086,
%U A056222 25168,307395,104259,577831,206819,1149058,488114,2030380,1156155,3805389,2233077,7109113
%N A056222 Image of partition numbers (A000041) under "little Hankel" transform that sends [c_0, c_1, ...] to [d_0, d_1, ...] where d_n = c_n^2 - c_{n+1}*c_{n-1}.
%H A056222 Stefano Spezia, <a href="/A056222/b056222.txt">Table of n, a(n) for n = 0..10000</a>
%t A056222 a[n_]:=PartitionsP[n+1]^2-PartitionsP[n]PartitionsP[n+2]; Array[a,40,0] (* _Stefano Spezia_, Jul 15 2024 *)
%Y A056222 Cf. A000041, A056221.
%K A056222 sign
%O A056222 0,4
%A A056222 _N. J. A. Sloane_, Aug 06 2000
%E A056222 a(40)-a(41) from _Stefano Spezia_, Jul 15 2024