Number of symmetric 0-1 matrices with nondecreasing row sums.
A351288
Number of symmetric 0-1 matrices with nondecreasing row sums.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =26a(4) =182a(5) =2170a(6) =45640a(7) =1728722a(8) =119663816a(9) =15307529470
External references
- oeis: A351288