A274872 - cp's OEIS frontend

A274872 Number of set partitions of [n] into exactly eight 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)
8	1
9	4
10	50
11	200
12	1519
13	6076
14	36564
15	146256
16	770481
17	3081924
18	14934774
19	59739096
20	273905827
21	1095623308
22	4836291512
23	19345166048
24	83144608885
25	332578435540
26	1402399388442
27	5609597553768
28	23330003686119
29	93320014744476
30	384220628807964
31	1536882515231856

[1, 4, 50, 200, 1519, 6076, 36564, 146256, 770481, 3081924, 14934774, 59739096, 273905827, 1095623308, 4836291512, 19345166048, 83144608885, 332578435540, 1402399388442, 5609597553768, 23330003686119, 93320014744476, 384220628807964, 1536882515231856]

cp's OEIS Frontend

A274872 Number of set partitions of [n] into exactly eight 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