A318396 - cp's OEIS frontend

A318396 Number of pairs of integer partitions (y, v) of n such that there exists a pair of set partitions of {1,...,n} with meet {{1},...,{n}}, the first having block sizes y and the second v.

n	a(n)
0	1
1	1
2	3
3	6
4	15
5	28
6	64
7	116
8	238
9	430
10	818
11	1426
12	2618
13	4439
14	7775
15	12993
16	22025
17	35946
18	59507
19	95319
20	154073
21	243226
22	385192
23	598531
24	933096
25	1429794
26	2193699
27	3322171
28	5027995
29	7524245
30	11253557
31	16661211
32	24637859
33	36130242
34	52879638
35	76830503
36	111422013
37	160505622

[1, 1, 3, 6, 15, 28, 64, 116, 238, 430, 818, 1426, 2618, 4439, 7775, 12993, 22025, 35946, 59507, 95319, 154073, 243226, 385192, 598531, 933096, 1429794, 2193699, 3322171, 5027995, 7524245, 11253557, 16661211, 24637859, 36130242, 52879638, 76830503, 111422013, 160505622]

cp's OEIS Frontend

A318396 Number of pairs of integer partitions (y, v) of n such that there exists a pair of set partitions of {1,...,n} with meet {{1},...,{n}}, the first having block sizes y and the second v.

Table of values

List of values