A029849 Number of nonisomorphic and nonantiisomorphic relations.

1, 2, 9, 74, 1740, 149572, 48575680, 56147642904, 229149201466592, 3333310913116926416, 174695272793893644765312, 33301710992572083379669646560, 23278728241293538748514513208527104

Offset

0,2

Links

Table of n, a(n) for n=0..12.

Formula

a(n) = (A000595(n) + A002500(n)) / 2. - Sean A. Irvine, Mar 05 2020

Crossrefs

Cf. A000595, A002500.

Sequence in context: A332722 A103996 A015473 * A288581 A197082 A243054

Adjacent sequences: A029846 A029847 A029848 * A029850 A029851 A029852

Keyword

nonn,nice

Author

Christian G. Bower, Jan 15 1998 and Jun 15 1998

Status

approved