A370172 - cp's OEIS frontend

A370172 Coefficient of x^n in the expansion of ( (1+x)^2 * (1+x+x^2)^3 )^n.

n	a(n)
0	1
1	5
2	51
3	581
4	6963
5	85905
6	1079943
7	13756216
8	176939187
9	2292988919
10	29892396451
11	391576960230
12	5150057095527
13	67962810381653
14	899458144305408
15	11933576896320981
16	158672857603511987
17	2113800649819533735
18	28207266176359605705
19	376976971371883606824

[1, 5, 51, 581, 6963, 85905, 1079943, 13756216, 176939187, 2292988919, 29892396451, 391576960230, 5150057095527, 67962810381653, 899458144305408, 11933576896320981, 158672857603511987, 2113800649819533735, 28207266176359605705, 376976971371883606824]

cp's OEIS Frontend

A370172 Coefficient of x^n in the expansion of ( (1+x)^2 * (1+x+x^2)^3 )^n.

Table of values

List of values