A255953 Number of collections of nonempty multisets with a total of n+3 objects of exactly n colors.

0, 5, 56, 492, 3936, 30710, 240012, 1904301, 15446672, 128576019, 1100414420, 9692024727, 87872444424, 820015945853, 7873581959208, 77748058644050, 789084769234176, 8226289694091564, 88033961164032132, 966450255695509761, 10877046448539404200

Offset

0,2

Links

Alois P. Heinz, Table of n, a(n) for n = 0..250

Formula

a(n) = A255903(n+3,n).

Example

a(1) = 5: {{1},{1},{1},{1}}, {{1},{1},{1,1}}, {{1,1},{1,1}}, {{1},{1,1,1}}, {{1,1,1,1}}.

Crossrefs

A diagonal of A255903.

Sequence in context: A247710 A247774 A258490 * A174249 A073563 A006658

Adjacent sequences: A255950 A255951 A255952 * A255954 A255955 A255956

Keyword

nonn

Author

Alois P. Heinz, Mar 11 2015

Status

approved