A246883 - cp's OEIS frontend

A246883 Expansion of Sum_{n>=0} x^n * Sum_{k=0..n} C(n,k)^2 * x^(3*k).

n	a(n)
0	1
1	1
2	1
3	1
4	2
5	5
6	10
7	17
8	27
9	46
10	86
11	165
12	308
13	558
14	1006
15	1841
16	3421
17	6383
18	11863
19	21966
20	40697
21	75662
22	141099
23	263429
24	491778
25	918104
26	1715259
27	3208078
28	6005818
29	11250198
30	21082487
31	39524241
32	74135187
33	139128897
34	261228200
35	490682127
36	922015964
37	1733127107
38	3258939997
39	6130162494
40	11534742080

[1, 1, 1, 1, 2, 5, 10, 17, 27, 46, 86, 165, 308, 558, 1006, 1841, 3421, 6383, 11863, 21966, 40697, 75662, 141099, 263429, 491778, 918104, 1715259, 3208078, 6005818, 11250198, 21082487, 39524241, 74135187, 139128897, 261228200, 490682127, 922015964, 1733127107, 3258939997, 6130162494, 11534742080]

cp's OEIS Frontend

A246883 Expansion of Sum_{n>=0} x^n * Sum_{k=0..n} C(n,k)^2 * x^(3*k).

Table of values

List of values