A138352 Table read by antidiagonals: T(n,k) is the number of transitive directed multigraphs with loops with n arcs and k vertices.

1, 1, 0, 1, 1, 0, 1, 2, 1, 0, 1, 2, 5, 1, 0, 1, 2, 8, 8, 1, 0, 1, 2, 9, 20, 14, 1, 0, 1, 2, 9, 29

Offset

0,8

Comments

Partial sums of the rows of A139623, i.e., T(n,k) = sum(T139623(n,p),p=0..k).

If k>=2n, T(n,k) = A139628(n).

Links

Table of n, a(n) for n=0..31.

Crossrefs

Cf. A138107.

Sequence in context: A114503 A103528 A277239 * A129620 A074766 A138107

Adjacent sequences: A138349 A138350 A138351 * A138353 A138354 A138355

Keyword

nonn,tabl

Author

Benoit Jubin, May 07 2008

Status

approved