A104631 - cp's OEIS frontend

A104631 Coefficient of x^(2n+1) in the expansion of (1+x+x^2+x^3+x^4)^n.

n	a(n)
0	0
1	1
2	4
3	18
4	80
5	365
6	1686
7	7875
8	37080
9	175725
10	837100
11	4004770
12	19227924
13	92599533
14	447118140
15	2163837030
16	10492874384
17	50972030189
18	248000853348
19	1208335275170
20	5894873067200
21	28791371852145
22	140768761906190

[0, 1, 4, 18, 80, 365, 1686, 7875, 37080, 175725, 837100, 4004770, 19227924, 92599533, 447118140, 2163837030, 10492874384, 50972030189, 248000853348, 1208335275170, 5894873067200, 28791371852145, 140768761906190]

cp's OEIS Frontend

A104631 Coefficient of x^(2n+1) in the expansion of (1+x+x^2+x^3+x^4)^n.

Table of values

List of values