A370171 - cp's OEIS frontend

A370171 Coefficient of x^n in the expansion of ( (1+x) * (1+x+x^2)^3 )^n.

n	a(n)
0	1
1	4
2	34
3	319
4	3146
5	31929
6	330145
7	3458620
8	36585194
9	389893576
10	4179819559
11	45025583343
12	486961123577
13	5284324727023
14	57508473997848
15	627410367071169
16	6859805605391466
17	75144918246760324
18	824558759018846116
19	9061483047671168437
20	99716283188165243471

[1, 4, 34, 319, 3146, 31929, 330145, 3458620, 36585194, 389893576, 4179819559, 45025583343, 486961123577, 5284324727023, 57508473997848, 627410367071169, 6859805605391466, 75144918246760324, 824558759018846116, 9061483047671168437, 99716283188165243471]

cp's OEIS Frontend

A370171 Coefficient of x^n in the expansion of ( (1+x) * (1+x+x^2)^3 )^n.

Table of values

List of values