A248876 - cp's OEIS frontend

A248876 G.f. satisfies: A(x) = exp( Sum_{n>=1} [Sum_{k=0..3n} T(n,k)^2 x^k] / A(x)^n * x^n/n ) where T(n,k) equals the coefficient of x^k in (1+x+x^2+x^3)^n.

n	a(n)
0	1
1	1
2	1
3	2
4	4
5	8
6	13
7	24
8	45
9	85
10	161
11	305
12	582
13	1116
14	2149
15	4152
16	8049
17	15653
18	30528
19	59695
20	117012
21	229880
22	452565
23	892703
24	1764099
25	3492029
26	6923494
27	13747483
28	27335873
29	54427621
30	108505081
31	216568556
32	432740907
33	865610375
34	1733227339
35	3473805680
36	6968708734
37	13991916510
38	28116598325

[1, 1, 1, 2, 4, 8, 13, 24, 45, 85, 161, 305, 582, 1116, 2149, 4152, 8049, 15653, 30528, 59695, 117012, 229880, 452565, 892703, 1764099, 3492029, 6923494, 13747483, 27335873, 54427621, 108505081, 216568556, 432740907, 865610375, 1733227339, 3473805680, 6968708734, 13991916510, 28116598325]

cp's OEIS Frontend

A248876 G.f. satisfies: A(x) = exp( Sum_{n>=1} [Sum_{k=0..3n} T(n,k)^2 x^k] / A(x)^n * x^n/n ) where T(n,k) equals the coefficient of x^k in (1+x+x^2+x^3)^n.

Table of values

List of values

cp's OEIS Frontend

A248876 G.f. satisfies: A(x) = exp( Sum_{n>=1} [Sum_{k=0..3*n} T(n,k)^2 * x^k] / A(x)^n * x^n/n ) where T(n,k) equals the coefficient of x^k in (1+x+x^2+x^3)^n.

Table of values

List of values

A248876 G.f. satisfies: A(x) = exp( Sum_{n>=1} [Sum_{k=0..3n} T(n,k)^2 x^k] / A(x)^n * x^n/n ) where T(n,k) equals the coefficient of x^k in (1+x+x^2+x^3)^n.