A274870 - cp's OEIS frontend

A274870 Number of set partitions of [n] into exactly six blocks such that all odd elements are in blocks with an odd index and all even elements are in blocks with an even index.

n	a(n)
6	1
7	3
8	22
9	66
10	311
11	933
12	3632
13	10896
14	38337
15	115011
16	381594
17	1144782
18	3664507
19	10993521
20	34404964
21	103214892
22	318365333
23	955095999
24	2918309966
25	8754929898
26	26585715663
27	79757146989
28	241208177496
29	723624532488
30	2182538747689
31	6547616243067
32	19713018571138

[1, 3, 22, 66, 311, 933, 3632, 10896, 38337, 115011, 381594, 1144782, 3664507, 10993521, 34404964, 103214892, 318365333, 955095999, 2918309966, 8754929898, 26585715663, 79757146989, 241208177496, 723624532488, 2182538747689, 6547616243067, 19713018571138]

cp's OEIS Frontend

A274870 Number of set partitions of [n] into exactly six blocks such that all odd elements are in blocks with an odd index and all even elements are in blocks with an even index.

Table of values

List of values