Number of non-descending integral vectors b of length n such that number of symmetric 0-1-matrices A of order n with row sums <= b is odd.
A028506
Number of non-descending integral vectors b of length n such that number of symmetric 0-1-matrices A of order n with row sums <= b is odd.
Terms
- a(0) =1a(1) =2a(2) =4a(3) =10a(4) =24a(5) =68a(6) =198a(7) =656
External references
- oeis: A028506