A370194 - cp's OEIS frontend

A370194 Coefficient of x^n in the expansion of ( (1+x) * (1+x^2)^2 )^n.

n	a(n)
0	1
1	1
2	5
3	19
4	77
5	326
6	1391
7	6028
8	26349
9	116011
10	513730
11	2285570
12	10208111
13	45742724
14	205550840
15	925918544
16	4179740909
17	18903381337
18	85635147983
19	388517336189
20	1765019420602
21	8028115465732
22	36555667019338
23	166621503161184
24	760161934681647
25	3470945792364701

[1, 1, 5, 19, 77, 326, 1391, 6028, 26349, 116011, 513730, 2285570, 10208111, 45742724, 205550840, 925918544, 4179740909, 18903381337, 85635147983, 388517336189, 1765019420602, 8028115465732, 36555667019338, 166621503161184, 760161934681647, 3470945792364701]

cp's OEIS Frontend

A370194 Coefficient of x^n in the expansion of ( (1+x) * (1+x^2)^2 )^n.

Table of values

List of values