A271273 - cp's OEIS frontend

A271273 Number of set partitions of [n] into m blocks such that at least one pair of distinct cyclically consecutive blocks (b,c) = (b,(b mod m)+1) exists having no pair of numbers (i,j) = (i,(i mod n)+1) with i member of b and j member of c.

n	a(n)
0	0
1	0
2	0
3	0
4	2
5	16
6	93
7	503
8	2736
9	15397
10	90556
11	558245
12	3607387
13	24409819
14	172696471
15	1275310652
16	9813238958
17	78548445033
18	652960116962
19	5628482431333
20	50236822145840
21	463647958566143
22	4419123858908203
23	43445718995990792
24	440083379418080388
25	4588225614805060248

[0, 0, 0, 0, 2, 16, 93, 503, 2736, 15397, 90556, 558245, 3607387, 24409819, 172696471, 1275310652, 9813238958, 78548445033, 652960116962, 5628482431333, 50236822145840, 463647958566143, 4419123858908203, 43445718995990792, 440083379418080388, 4588225614805060248]

cp's OEIS Frontend

A271273 Number of set partitions of [n] into m blocks such that at least one pair of distinct cyclically consecutive blocks (b,c) = (b,(b mod m)+1) exists having no pair of numbers (i,j) = (i,(i mod n)+1) with i member of b and j member of c.

Table of values

List of values