A139685 Number of n X n symmetric binary matrices with no row sum greater than 9.
1, 2, 8, 64, 1024, 32768, 2097152, 268435456, 68719476736, 35184372088832, 35680013894626133, 69256173251646457490, 241954801784975938299853, 1412334943658808490059334190, 12845700351286288760264255058879, 171982565320546482600201655399505478
Offset: 0
Keywords
Links
- Andrew Howroyd, Table of n, a(n) for n = 0..20
- H. D. Nguyen, D. Taggart, Mining the OEIS: Ten Experimental Conjectures, 2013. (mentions this sequence)
Crossrefs
Column k=9 of A334548.
Extensions
Terms a(13) and beyond from Andrew Howroyd, May 08 2020