A337717 Number of connected graphs, where vertices are labeled with positive integers summing to n, and where identically labeled vertices are indistinguishable and cannot be connected with an edge.

1, 1, 1, 2, 3, 6, 12, 28, 65, 173, 496, 1527, 5092, 18669, 74601, 325206, 1572191, 8487232, 50962240, 343162568, 2627538015, 22853622935, 225118360626, 2539559186827, 33036542404276, 491977100299885, 8394837931641837

Offset

0,4

Links

Max Alekseyev, Table of n, a(n) for n = 0..30

Crossrefs

Inverse Euler transform of A337716.

Sequence in context: A014280 A073431 A273873 * A003317 A145062 A300323

Adjacent sequences: A337714 A337715 A337716 * A337718 A337719 A337720

Keyword

nonn

Author

Max Alekseyev following a suggestion from Franklin T. Adams-Watters, Sep 16 2020

Status

approved