A200537 - cp's OEIS frontend

A200537 G.f. satisfies: A(x) = exp( Sum_{n>=1} [Sum_{k=0..2n} A200536(n,k)^2 x^k] / A(x)^n * x^n/n ), where A200536(n,k) is the coefficient of x^k in (1+3x+2x^2)^n.

n	a(n)
0	1
1	1
2	9
3	13
4	40
5	72
6	144
7	252
8	432
9	720
10	1152
11	1872
12	2880
13	4608
14	6912
15	10944
16	16128
17	25344
18	36864
19	57600
20	82944
21	129024
22	184320
23	285696
24	405504
25	626688
26	884736
27	1363968
28	1916928
29	2949120
30	4128768
31	6340608
32	8847360
33	13565952
34	18874368
35	28901376
36	40108032
37	61341696
38	84934656
39	129761280

[1, 1, 9, 13, 40, 72, 144, 252, 432, 720, 1152, 1872, 2880, 4608, 6912, 10944, 16128, 25344, 36864, 57600, 82944, 129024, 184320, 285696, 405504, 626688, 884736, 1363968, 1916928, 2949120, 4128768, 6340608, 8847360, 13565952, 18874368, 28901376, 40108032, 61341696, 84934656, 129761280]

cp's OEIS Frontend

A200537 G.f. satisfies: A(x) = exp( Sum_{n>=1} [Sum_{k=0..2n} A200536(n,k)^2 x^k] / A(x)^n * x^n/n ), where A200536(n,k) is the coefficient of x^k in (1+3x+2x^2)^n.

Table of values

List of values

cp's OEIS Frontend

A200537 G.f. satisfies: A(x) = exp( Sum_{n>=1} [Sum_{k=0..2*n} A200536(n,k)^2 * x^k] / A(x)^n * x^n/n ), where A200536(n,k) is the coefficient of x^k in (1+3*x+2*x^2)^n.

Table of values

List of values

A200537 G.f. satisfies: A(x) = exp( Sum_{n>=1} [Sum_{k=0..2n} A200536(n,k)^2 x^k] / A(x)^n * x^n/n ), where A200536(n,k) is the coefficient of x^k in (1+3x+2x^2)^n.