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 A026876 #15 Aug 19 2022 14:30:11 %S A026876 1,3,11,43,174,721,3042,13022,56420,246977,1090846,4856162,21770665, %T A026876 98217318,445634370,2032434475,9313305870,42861416044,198038717055, %U A026876 918368326483,4273103732070,19944292913477,93356009312511,438150836819153 %N A026876 T(2n+1, n+1), T given by A026758. %C A026876 The invert transform of this sequences (shifted) appears to be A165538 (conjectured). - _Michael D. Weiner_, Aug 04 2018 %F A026876 G.f. f satisfies: x^6*f^4 + x^3*(4*x-1)*(x-1)*f^3 + x*(x-1)*(6*x^2-6*x+1)*f^2 + (4*x-1)*(x-1)^2*f + (x-1)^2 = 0 (conjectured). - _Michael D. Weiner_, Aug 04 2018 %Y A026876 Cf. A026758, A165538. %K A026876 nonn %O A026876 0,2 %A A026876 _Clark Kimberling_