A073960 Number of commuting elements: number of ordered pairs g, h in the group GL(n,2) such that gh = hg.

1, 18, 1008, 282240, 269982720, 1209522585600, 19170449172725760, 1315623687226078003200, 342810031916266844848128000, 367173017574548024679647831654400, 1534674653372294809728193910618770636800, 26108462572660693961035262279317764270194688000

Offset

1,2

Links

Eric M. Schmidt, Table of n, a(n) for n = 1..30

Formula

a(n) = A002884(n) * A006951(n).

Crossrefs

Cf. A002884, A006951.

Sequence in context: A129009 A042409 A363103 * A095786 A214181 A275653

Adjacent sequences: A073957 A073958 A073959 * A073961 A073962 A073963

Keyword

nonn

Author

Yuval Dekel (dekelyuval(AT)hotmail.com), Sep 13 2003

Extensions

More terms from Eric M. Schmidt, May 05 2013

Status

approved