A324011 - cp's OEIS frontend

A324011 Number of set partitions of {1, ..., n} with no singletons or cyclical adjacencies (successive elements in the same block, where 1 is a successor of n).

n	a(n)
0	1
1	0
2	0
3	0
4	1
5	0
6	5
7	14
8	66
9	307
10	1554
11	8415
12	48530
13	296582
14	1913561
15	12988776
16	92467629
17	688528288
18	5349409512
19	43270425827
20	363680219762
21	3170394634443
22	28619600156344
23	267129951788160
24	2574517930001445
25	25587989366964056
26	261961602231869825

[1, 0, 0, 0, 1, 0, 5, 14, 66, 307, 1554, 8415, 48530, 296582, 1913561, 12988776, 92467629, 688528288, 5349409512, 43270425827, 363680219762, 3170394634443, 28619600156344, 267129951788160, 2574517930001445, 25587989366964056, 261961602231869825]

cp's OEIS Frontend

A324011 Number of set partitions of {1, ..., n} with no singletons or cyclical adjacencies (successive elements in the same block, where 1 is a successor of n).

Table of values

List of values