A372369 - cp's OEIS frontend

A372369 Coefficient of x^n in the expansion of ( (1+x+x^2)^3 / (1+x) )^n.

n	a(n)
0	1
1	2
2	12
3	65
4	388
5	2352
6	14565
7	91289
8	577764
9	3683459
10	23621462
11	152203482
12	984598741
13	6390596591
14	41596873869
15	271424778015
16	1774892605284
17	11628321367815
18	76311803660025
19	501554760288813
20	3300889231760238
21	21750690436059188
22	143481522241226962

[1, 2, 12, 65, 388, 2352, 14565, 91289, 577764, 3683459, 23621462, 152203482, 984598741, 6390596591, 41596873869, 271424778015, 1774892605284, 11628321367815, 76311803660025, 501554760288813, 3300889231760238, 21750690436059188, 143481522241226962]

cp's OEIS Frontend

A372369 Coefficient of x^n in the expansion of ( (1+x+x^2)^3 / (1+x) )^n.

Table of values

List of values