A139685 - OEIS

%I #15 Aug 06 2024 04:39:21

%S 1,2,8,64,1024,32768,2097152,268435456,68719476736,35184372088832,

%T 35680013894626133,69256173251646457490,241954801784975938299853,

%U 1412334943658808490059334190,12845700351286288760264255058879,171982565320546482600201655399505478

%N Number of n X n symmetric binary matrices with no row sum greater than 9.

%H Andrew Howroyd, <a href="/A139685/b139685.txt">Table of n, a(n) for n = 0..20</a>

%H H. D. Nguyen, D. Taggart, <a href="https://citeseerx.ist.psu.edu/pdf/8f2f36f22878c984775ed04368b8893879b99458">Mining the OEIS: Ten Experimental Conjectures</a>, 2013. (mentions this sequence)

%Y Column k=9 of A334548.

%K nonn

%O 0,2

%A _R. H. Hardin_, Jun 13 2008

%E Terms a(13) and beyond from _Andrew Howroyd_, May 08 2020