A320254 - cp's OEIS frontend

A320254 a(n) = n! * [x^n] exp(exp(x)(x + (n/2 - 1)x^2)).

n	a(n)
0	1
1	1
2	3
3	16
4	125
5	1291
6	16177
7	241207
8	4153193
9	81082225
10	1770989921
11	42763506919
12	1131353484637
13	32541516492811
14	1011058416700529
15	33745374949198231
16	1204107124715441873
17	45741398365345761073
18	1843069565594762478145
19	78511973999963036415967
20	3525468554804288803649381

[1, 1, 3, 16, 125, 1291, 16177, 241207, 4153193, 81082225, 1770989921, 42763506919, 1131353484637, 32541516492811, 1011058416700529, 33745374949198231, 1204107124715441873, 45741398365345761073, 1843069565594762478145, 78511973999963036415967, 3525468554804288803649381]

cp's OEIS Frontend

A320254 a(n) = n! * [x^n] exp(exp(x)(x + (n/2 - 1)x^2)).

Table of values

List of values

cp's OEIS Frontend

A320254 a(n) = n! * [x^n] exp(exp(x)*(x + (n/2 - 1)*x^2)).

Table of values

List of values

A320254 a(n) = n! * [x^n] exp(exp(x)(x + (n/2 - 1)x^2)).