A271272 - cp's OEIS frontend

A271272 Number of set partitions of [n] into m blocks such that for each pair of distinct cyclically consecutive blocks (b,c) = (b,(b mod m)+1) at least one pair of numbers (i,j) = (i,(i mod n)+1) exists with i member of b and j member of c.

n	a(n)
0	1
1	1
2	2
3	5
4	13
5	36
6	110
7	374
8	1404
9	5750
10	25419
11	120325
12	606210
13	3234618
14	18202851
15	107647893
16	666903189
17	4316424771
18	29116689197
19	204259773724
20	1487336089532
21	11221857590608
22	87591879539120
23	706286859093554
24	5875489876724901
25	50364717424939105
26	444367708336858660

[1, 1, 2, 5, 13, 36, 110, 374, 1404, 5750, 25419, 120325, 606210, 3234618, 18202851, 107647893, 666903189, 4316424771, 29116689197, 204259773724, 1487336089532, 11221857590608, 87591879539120, 706286859093554, 5875489876724901, 50364717424939105, 444367708336858660]

cp's OEIS Frontend

A271272 Number of set partitions of [n] into m blocks such that for each pair of distinct cyclically consecutive blocks (b,c) = (b,(b mod m)+1) at least one pair of numbers (i,j) = (i,(i mod n)+1) exists with i member of b and j member of c.

Table of values

List of values