Array read by antidiagonals: T(n,r) is the number of connected r-regular loopless multigraphs on n unlabeled nodes.

A328682

Array read by antidiagonals: T(n,r) is the number of connected r-regular loopless multigraphs on n unlabeled nodes.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =1a(4) =0a(5) =0a(6) =1a(7) =0a(8) =1a(9) =0a(10) =1a(11) =0a(12) =1a(13) =0a(14) =0a(15) =1a(16) =0a(17) =1a(18) =1a(19) =0a(20) =0a(21) =1a(22) =0a(23) =1a(24) =0a(25) =1a(26) =0a(27) =0a(28) =1a(29) =0

External references