A226855 - cp's OEIS frontend

A226855 a(n) = nB(n-1) + n(n-1)*B(n-2), where the B(i) are Bell numbers (A000110).

n	a(n)
0	0
1	1
2	4
3	12
4	44
5	175
6	762
7	3605
8	18384
9	100404
10	584070
11	3601895
12	23451540
13	160633681
14	1153896772
15	8668821600
16	67943174000
17	554327140739
18	4698491153454
19	41299244789989
20	375844030441560

[0, 1, 4, 12, 44, 175, 762, 3605, 18384, 100404, 584070, 3601895, 23451540, 160633681, 1153896772, 8668821600, 67943174000, 554327140739, 4698491153454, 41299244789989, 375844030441560]

cp's OEIS Frontend

A226855 a(n) = nB(n-1) + n(n-1)*B(n-2), where the B(i) are Bell numbers (A000110).

Table of values

List of values

cp's OEIS Frontend

A226855 a(n) = n*B(n-1) + n*(n-1)*B(n-2), where the B(i) are Bell numbers (A000110).

Table of values

List of values

A226855 a(n) = nB(n-1) + n(n-1)*B(n-2), where the B(i) are Bell numbers (A000110).