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 A143374 #18 Jul 09 2025 04:29:44 %S A143374 1,-1,-1,-1,1,2,-1,2,0,-1,0,0,0,-2,-2,2,-3,-1,1,2,3,4,1,-3,0,-2,3,-4, %T A143374 2,0,-1,-1,-2,-1,0,-2,-2,2,2,-1,0,5,-1,5,0,2,-3,-3,-3,1,3,2,2,-2,4,-6, %U A143374 -4,2,-2,-1,2,-6,0,8,-4,-3,2,5,1,-6,3,6,-1,1,-4,-10,1,2,-1,2,-5,-2,6,13,4,1,-1,2,1,4,-4,-1 %N A143374 G.f.: eta(q)*eta(q^3)*eta(q^9)*eta(q^27)*eta(q^81)*eta(q^243)*..., where eta(q) = Product((1-q^m), m=1..oo). %C A143374 eta(q) = A(q)/A(q^3), where A(q) is the g.f. for this sequence (cf. A010815). %H A143374 Seiichi Manyama, <a href="/A143374/b143374.txt">Table of n, a(n) for n = 0..10000</a> %Y A143374 Cf. A010815, A083650, A030189, A160832, A170925, A173241, A194087. %K A143374 sign %O A143374 0,6 %A A143374 _N. J. A. Sloane_ and _Gary W. Adamson_, Feb 18 2010, Aug 14 2011