A218684 - cp's OEIS frontend

A218684 O.g.f.: Sum_{n>=0} (1+n^2x)^n x^n/n! * exp(-(1+n^2x)x).

n	a(n)
0	1
1	0
2	1
3	2
4	7
5	18
6	96
7	260
8	1851
9	5270
10	46515
11	137942
12	1447202
13	4433772
14	53787706
15	169169912
16	2326986783
17	7477418982
18	114916173009
19	375898894514
20	6380455164161
21	21185872231238
22	393499602818322
23	1323362744628080
24	26691270481453228
25	90755667374332324

[1, 0, 1, 2, 7, 18, 96, 260, 1851, 5270, 46515, 137942, 1447202, 4433772, 53787706, 169169912, 2326986783, 7477418982, 114916173009, 375898894514, 6380455164161, 21185872231238, 393499602818322, 1323362744628080, 26691270481453228, 90755667374332324]

cp's OEIS Frontend

A218684 O.g.f.: Sum_{n>=0} (1+n^2x)^n x^n/n! * exp(-(1+n^2x)x).

Table of values

List of values

cp's OEIS Frontend

A218684 O.g.f.: Sum_{n>=0} (1+n^2*x)^n * x^n/n! * exp(-(1+n^2*x)*x).

Table of values

List of values

A218684 O.g.f.: Sum_{n>=0} (1+n^2x)^n x^n/n! * exp(-(1+n^2x)x).