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 A281876 #25 Aug 21 2018 06:49:18 %S A281876 0,9,3968,296865,8437248,129997260,1312568064,9727799265,56923182080, %T A281876 276480648702,1154893046400,4259743681004,14151477247488, %U A281876 43011568291320,121065502097664,318760489739745,791380439553024,1865315725321293,4197159808767360,9059718006875214 %N A281876 a(n) = (A013963(n) - A027364(n))/3617. %H A281876 Seiichi Manyama, <a href="/A281876/b281876.txt">Table of n, a(n) for n = 1..10000</a> %e A281876 a(1) = (1 - 1)/3617 = 0. %e A281876 a(2) = (32769 - 216)/3617 = 9. %e A281876 a(3) = (14348908 - (-3348))/3617 = 3968. %Y A281876 Cf. A013963, A027860, A027364, A281788, A281928, A281956. %K A281876 nonn %O A281876 1,2 %A A281876 _Seiichi Manyama_, Feb 01 2017