A272065 - cp's OEIS frontend

A272065 Number of set partitions of [n] such that at least one pair of consecutive blocks (b,b+1) exists having not exactly one pair of consecutive numbers (i,i+1) with i member of b and i+1 member of b+1.

n	a(n)
0	0
1	0
2	0
3	0
4	2
5	17
6	101
7	545
8	2935
9	16351
10	95335
11	583373
12	3745903
13	25208633
14	177505205
15	1305468285
16	10009943248
17	79880835800
18	662319435622
19	5696570446421
20	50749156111271
21	467630493212126
22	4451067568592918
23	43709810099960739
24	442331477265626019

[0, 0, 0, 0, 2, 17, 101, 545, 2935, 16351, 95335, 583373, 3745903, 25208633, 177505205, 1305468285, 10009943248, 79880835800, 662319435622, 5696570446421, 50749156111271, 467630493212126, 4451067568592918, 43709810099960739, 442331477265626019]

cp's OEIS Frontend

A272065 Number of set partitions of [n] such that at least one pair of consecutive blocks (b,b+1) exists having not exactly one pair of consecutive numbers (i,i+1) with i member of b and i+1 member of b+1.

Table of values

List of values