A249478 - cp's OEIS frontend

A249478 E.g.f.: P(x)/exp(2) + Q(x), where P(x) = 1/Product_{n>=1} (1 - x^n/n) and Q(x) = Sum_{n>=1} -(-2)^n/Product_{k=1..n} (k - x^k).

n	a(n)
0	1
1	1
2	1
3	5
4	12
5	88
6	496
7	4032
8	32072
9	335144
10	3443928
11	41477176
12	523289472
13	7298441952
14	107525078304
15	1714360202528
16	28771306555776
17	515446334184832
18	9722819034952832
19	193501572577378944
20	4042243606465206784
21	88584621284011603968
22	2029364250844776170496
23	48539531534286294782976

[1, 1, 1, 5, 12, 88, 496, 4032, 32072, 335144, 3443928, 41477176, 523289472, 7298441952, 107525078304, 1714360202528, 28771306555776, 515446334184832, 9722819034952832, 193501572577378944, 4042243606465206784, 88584621284011603968, 2029364250844776170496, 48539531534286294782976]

cp's OEIS Frontend

A249478 E.g.f.: P(x)/exp(2) + Q(x), where P(x) = 1/Product_{n>=1} (1 - x^n/n) and Q(x) = Sum_{n>=1} -(-2)^n/Product_{k=1..n} (k - x^k).

Table of values

List of values