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Used by Polya in calculating A000598.
0

%I #11 Nov 21 2020 17:04:14

%S 0,0,0,0,0,0,0,0,1,7,37,154,558,1830,5581,16077,44251,117308,301330,

%T 753458,1840568,4405344,10355493,23953832,54614151,122903818,

%U 273320540,601273377,1309641376,2826528077,6048868456,12843409063,27071247989

%N Used by Polya in calculating A000598.

%H 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^{III}(x) on p. 441.

%H 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^{III}(x) on p. 441. (Annotated scanned copy)

%F G.f.: x * q(x) * (2*p(x)*p(x^2) + (q(x)^2-q(x^2))*m(x) + (p(x)^2-p(x^2))*q(x)) / 2 where m(x) is the g.f. of A036677, p(x) is the g.f. of A036676, and q(x) is the g.f. of A000621 with offset 0 [from Polya]. - _Sean A. Irvine_, Nov 21 2020

%K nonn

%O 0,10

%A _N. J. A. Sloane_.