A086215 & A085656

[Max]

Max wrote:

> Similarly, it possible to extend A085656 which counts the number of nxn 
> positive definite matrices with elements {0,1}.
> I have computed first 3 more terms:
> 
> %S A085656 1, 3, 27, 681, 43369, 6184475, 1688686483, 665444089745

Actually the number of distinct symmetric parts of the matrices in A085656 is A085657. Correspondingly, there are 3 more terms:

%S A085657 1, 2, 8, 61, 819, 17417, 506609, 15582436

The number of distinct symmetric parts of the matrices in A086215 was not in OEIS. Now it is:

%S A114601 1, 3, 23, 393, 13089, 737595

Max