A209801 - cp's OEIS frontend

A209801 The number of partitions of the set [n] where each element can be colored 1 or 2 avoiding the patterns 1^11^2 in the equality sense.

n	a(n)
0	1
1	2
2	7
3	30
4	152
5	878
6	5653
7	39952
8	306419
9	2527984
10	22277080
11	208483014
12	2062199125
13	21472152822
14	234526948183
15	2678973711602
16	31919113081724
17	395750219427590
18	5095324584255641
19	67996852799627404
20	938939425151949211
21	13395286474394627364
22	197162835188949226772

[1, 2, 7, 30, 152, 878, 5653, 39952, 306419, 2527984, 22277080, 208483014, 2062199125, 21472152822, 234526948183, 2678973711602, 31919113081724, 395750219427590, 5095324584255641, 67996852799627404, 938939425151949211, 13395286474394627364, 197162835188949226772]

cp's OEIS Frontend

A209801 The number of partitions of the set [n] where each element can be colored 1 or 2 avoiding the patterns 1^11^2 in the equality sense.

Table of values

List of values