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 A203498 #9 Feb 17 2025 08:12:24 %S A203498 1,2,44,12,2316,56,86756,7548,2745504,14216,8303228,27440,26755926552, %T A203498 17777912,337554780656,166149231952,41032825702988,10165065032, %U A203498 19445273523788,559223251080,52853093762480872,2217608618621076,3130076262074284420,9840817961344 %N A203498 Row sums of triangle A203484. %C A203498 Conjecture. If prime p==1 (mod 3), then a((p-1)/3)==2 (mod p); if prime p==2 mod 3, then a((2*p-1)/3)==2 (mod p). %Y A203498 Cf. A202941, A202917, A203269, A203278, A203484, A178473. %K A203498 nonn %O A203498 0,2 %A A203498 _Vladimir Shevelev_ and _Peter J. C. Moses_, Jan 02 2012