A320615 - cp's OEIS frontend

A320615 Number of ordered set partitions of [n] where k = two is minimal such that for each block b the smallest integer interval containing b has at most k elements.

n	a(n)
2	1
3	4
4	20
5	114
6	750
7	5616
8	47304
9	443400
10	4582200
11	51790320
12	635791680
13	8426915280
14	119960552880
15	1825701857280
16	29585590473600
17	508653914267520
18	9248148480574080
19	177303557272262400
20	3574966680853747200
21	75628468328518828800
22	1675003757666567328000

[1, 4, 20, 114, 750, 5616, 47304, 443400, 4582200, 51790320, 635791680, 8426915280, 119960552880, 1825701857280, 29585590473600, 508653914267520, 9248148480574080, 177303557272262400, 3574966680853747200, 75628468328518828800, 1675003757666567328000]

cp's OEIS Frontend

A320615 Number of ordered set partitions of [n] where k = two is minimal such that for each block b the smallest integer interval containing b has at most k elements.

Table of values

List of values