A287673 - cp's OEIS frontend

A287673 Number of set partitions of [n] such that j is member of block b only if b = 1 or at least one of j-1, ..., j-10 is member of a block >= b-1.

n	a(n)
0	1
1	1
2	2
3	5
4	15
5	52
6	203
7	877
8	4140
9	21147
10	115975
11	678570
12	4213597
13	27644436
14	190898290
15	1382887161
16	10477990158
17	82819430415
18	681282289857
19	5820296183791
20	51541816775857
21	472306124149579
22	4471549108520595
23	43676154621078016
24	439558508006341652

[1, 1, 2, 5, 15, 52, 203, 877, 4140, 21147, 115975, 678570, 4213597, 27644436, 190898290, 1382887161, 10477990158, 82819430415, 681282289857, 5820296183791, 51541816775857, 472306124149579, 4471549108520595, 43676154621078016, 439558508006341652]

cp's OEIS Frontend

A287673 Number of set partitions of [n] such that j is member of block b only if b = 1 or at least one of j-1, ..., j-10 is member of a block >= b-1.

Table of values

List of values