A140987 Number of groups of order F(n).

1, 1, 1, 1, 1, 5, 1, 2, 2, 2, 1, 197, 1, 1, 6, 2, 1, 41, 1, 7, 4, 1, 1

Offset

1,6

Links

Table of n, a(n) for n=1..23.

GAP package GrpConst

Formula

a(n) = A000001(A000045(n)).

Example

a(6) = 5 because Fibonacci number F(6) = 8 and there are 5 groups of order 8.

Crossrefs

Cf. A000001, A000040, A000045, A001358, A001605, A072381.

Sequence in context: A260821 A068115 A068139 * A097562 A275889 A046771

Adjacent sequences: A140984 A140985 A140986 * A140988 A140989 A140990

Keyword

nonn,more

Author

Jonathan Vos Post, Jul 28 2008

Extensions

Entries through a(17) checked by N. J. A. Sloane, Aug 01 2008

a(18)-a(23) from Eric M. Schmidt, Jun 19 2014

Status

approved