A128231 - cp's OEIS frontend

A128231 Expansion of exp(x)/(1 - x^3/3!), where a(n) = 1 + binomial(n,3)*a(n-3).

n	a(n)
0	1
1	1
2	1
3	2
4	5
5	11
6	41
7	176
8	617
9	3445
10	21121
11	101806
12	757901
13	6040607
14	37057385
15	344844956
16	3382739921
17	25199021801
18	281393484097
19	3277874983450
20	28726884853141
21	374253333849011
22	5047927474513001
23	50875313074912712

[1, 1, 1, 2, 5, 11, 41, 176, 617, 3445, 21121, 101806, 757901, 6040607, 37057385, 344844956, 3382739921, 25199021801, 281393484097, 3277874983450, 28726884853141, 374253333849011, 5047927474513001, 50875313074912712]

cp's OEIS Frontend

A128231 Expansion of exp(x)/(1 - x^3/3!), where a(n) = 1 + binomial(n,3)*a(n-3).

Table of values

List of values