A046168 Number of minimal covers on n objects with 8 members.

0, 0, 0, 0, 0, 0, 0, 1, 2259, 2835075, 2609269245, 1964842113102, 1282310235724518, 751046094737039530, 403981152738311915910, 202813559477327441603103, 96164301413883629093787477, 43451168714121294538702462965, 18840049876438047870808567312395

Offset

1,9

Links

Table of n, a(n) for n=1..19.

Eric Weisstein's World of Mathematics, Minimal Cover.

Formula

G.f.: x^8 / Product_{k=2^8-9..2^8-1} (1-k*x). - Sean A. Irvine, Apr 07 2021

Crossrefs

Cf. A035348.

Sequence in context: A257825 A251678 A231245 * A251509 A263972 A263963

Adjacent sequences: A046165 A046166 A046167 * A046169 A046170 A046171

Keyword

nonn

Author

Eric W. Weisstein

Extensions

More terms from Sean A. Irvine, Apr 07 2021

Status

approved