A320617 Number of ordered set partitions of [n] where k = four is minimal such that for each block b the smallest integer interval containing b has at most k elements.

13, 114, 924, 8152, 79682, 845874, 9699504, 119751978, 1586912838, 22489462512, 339643322952, 5448229269576, 92547041455104, 1660105401121800, 31366215961317480, 622755664408102200, 12964583019385962840, 282431877654287832480, 6426548730391132252800

Offset

4,1

Links

Alois P. Heinz, Table of n, a(n) for n = 4..450

Crossrefs

Column k=4 of A276891.

Cf. A320554.

Sequence in context: A221369 A320213 A323037 * A156969 A287471 A016765

Adjacent sequences: A320614 A320615 A320616 * A320618 A320619 A320620

Keyword

nonn

Author

Alois P. Heinz, Oct 17 2018

Status

approved