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A139685 Number of n X n symmetric binary matrices with no row sum greater than 9. 3
1, 2, 8, 64, 1024, 32768, 2097152, 268435456, 68719476736, 35184372088832, 35680013894626133, 69256173251646457490, 241954801784975938299853 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

REFERENCES

H. D. Nguyen, D. Taggart, Mining the OEIS: Ten Experimental Conjectures, 2013; http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.391.2522&rep=rep1&type=pdf. Mentions this sequence. - From N. J. A. Sloane, Mar 16 2014

LINKS

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

CROSSREFS

Sequence in context: A139682 A139683 A139684 * A006125 A193753 A006119

Adjacent sequences:  A139682 A139683 A139684 * A139686 A139687 A139688

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jun 13 2008

STATUS

approved

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Last modified February 21 10:51 EST 2018. Contains 299390 sequences. (Running on oeis4.)