A261492 - cp's OEIS frontend

A261492 Number of partitions of subsets of {1,...,n}, where consecutive integers are required to be in the same part and the elements of {1, n} are required to be in the same part if they are both members of a subset.

n	a(n)
0	1
1	2
2	4
3	8
4	18
5	42
6	102
7	254
8	648
9	1688
10	4486
11	12146
12	33474
13	93810
14	267112
15	772124
16	2264214
17	6731254
18	20275118
19	61841886
20	190914356
21	596256556
22	1883148834
23	6012081046
24	19395355770
25	63205986042
26	208003526516
27	691048272152
28	2317140259834
29	7839542054210

[1, 2, 4, 8, 18, 42, 102, 254, 648, 1688, 4486, 12146, 33474, 93810, 267112, 772124, 2264214, 6731254, 20275118, 61841886, 190914356, 596256556, 1883148834, 6012081046, 19395355770, 63205986042, 208003526516, 691048272152, 2317140259834, 7839542054210]

cp's OEIS Frontend

A261492 Number of partitions of subsets of {1,...,n}, where consecutive integers are required to be in the same part and the elements of {1, n} are required to be in the same part if they are both members of a subset.

Table of values

List of values