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 A036677 #13 Jul 08 2025 21:54:05
%S A036677 0,0,0,0,0,0,1,5,19,63,184,503,1300,3229,7748,18106,41327,92521,
%T A036677 203601,441466,944618,1997726,4180405,8665024,17805427,36299704,
%U A036677 73468100,147704332,295122569,586304222,1158582080,2278084748,4458522727
%N A036677 Used by Polya in calculating A000598.
%H A036677 G. Polya, <a href="http://dx.doi.org/10.1524/zkri.1936.93.1.415">Algebraische Berechnung der Anzahl der Isomeren einiger organischer Verbindungen</a>, Zeit. f. Kristall., 93 (1936), 415-443; q^{II}(x) on p. 441.
%H A036677 G. Polya, <a href="/A000598/a000598_3.pdf">Algebraische Berechnung der Anzahl der Isomeren einiger organischer Verbindungen</a>, Zeit. f. Kristall., 93 (1936), 415-443; q^{II}(x) on p. 441. (Annotated scanned copy)
%F A036677 G.f.: x * q(x) * (2*q(x)*p(x^2) + (q(x)^2-q(x^2)) * p(x)) / 2 where p(x) is the g.f. for A036676 and q(x) is the g.f. for A000621 with offset 0 [from Polya]. - _Sean A. Irvine_, Nov 21 2020
%K A036677 nonn
%O A036677 0,8
%A A036677 _N. J. A. Sloane_