A139681 Number of n X n symmetric binary matrices with no row sum greater than 5.

1, 2, 8, 64, 1024, 32768, 1914733, 178499118, 23973965155, 4356864886906, 1028823851939030, 306635655405986312, 112789704243814005142, 50281311185009713150048, 26760450115727957945767409, 16787646103442094018698106106, 12278130772483524854754380090307

Offset: 0

Author

R. H. Hardin, Jun 13 2008

Keywords

• nonn

Links

• Andrew Howroyd, Table of n, a(n) for n = 0..30

Crossrefs

Column k=5 of A334548.

Extensions

Terms a(13) and beyond from Andrew Howroyd, May 08 2020