A276725 Number of set partitions of [n] such that for each block b the smallest integer interval containing b has at most nine elements.

1, 1, 2, 5, 15, 52, 203, 877, 4140, 21147, 94828, 389946, 1527058, 5846917, 22257299, 85116719, 329147169, 1292371138, 5165744159, 20781403539, 83617668276, 335483033770, 1340729704086, 5338181115652, 21193583922048, 84001778063348, 332811761809618

Offset

0,3

Links

Alois P. Heinz, Table of n, a(n) for n = 0..512

Pierpaolo Natalini, Paolo Emilio Ricci, New Bell-Sheffer Polynomial Sets, Axioms 2018, 7(4), 71.

Wikipedia, Partition of a set

Crossrefs

Column k=9 of A276719.

Cf. A276843, A276899.

Sequence in context: A192865 A229225 A343669 * A287587 A287280 A287258

Adjacent sequences: A276722 A276723 A276724 * A276726 A276727 A276728

Keyword

nonn

Author

Alois P. Heinz, Sep 16 2016

Status

approved