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

Author

Alois P. Heinz, Sep 16 2016

Keywords

• nonn

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.