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A036676
Used by Polya in calculating A000598.
2
0, 0, 0, 0, 1, 3, 8, 20, 46, 102, 220, 461, 948, 1921, 3836, 7574, 14810, 28705, 55212, 105485, 200300, 378262, 710795, 1329603, 2476817, 4596297, 8499396, 15665681, 28786696, 52747907, 96398485, 175735593, 319623891, 580054269
OFFSET
0,6
LINKS
G. Polya, Algebraische Berechnung der Anzahl der Isomeren einiger organischer Verbindungen, Zeit. f. Kristall., 93 (1936), 415-443; q^{I}(x) on p. 441.
G. Polya, Algebraische Berechnung der Anzahl der Isomeren einiger organischer Verbindungen, Zeit. f. Kristall., 93 (1936), 415-443; q^{I}(x) on p. 441. (Annotated scanned copy)
FORMULA
G.f.: x * q(x) * (q(x)^3 - 3*q(x)*q(x^2) + 2*q(x^3)) / 6 where q(x) is the g.f. of A000621 with offset 0 [from Polya]. - Sean A. Irvine, Nov 21 2020
CROSSREFS
Sequence in context: A027928 A026624 A026690 * A101533 A138803 A048492
KEYWORD
nonn
AUTHOR
EXTENSIONS
a(33) corrected by Sean A. Irvine, Nov 21 2020
STATUS
approved