A124996 - cp's OEIS frontend

A124996 a(n) is the constant term in the expansion of Product_{k=1..n} (x^k + 1/x^k)^4.

n	a(n)
0	1
1	6
2	44
3	426
4	4658
5	55260
6	689508
7	8914872
8	118374410
9	1604658420
10	22115171280
11	308940507202
12	4364729023812
13	62256518307724
14	895294865045296
15	12966655239260890
16	188967013096930258
17	2769003814616561636
18	40773380119956434784
19	603008173331642200144

[1, 6, 44, 426, 4658, 55260, 689508, 8914872, 118374410, 1604658420, 22115171280, 308940507202, 4364729023812, 62256518307724, 895294865045296, 12966655239260890, 188967013096930258, 2769003814616561636, 40773380119956434784, 603008173331642200144]

cp's OEIS Frontend

A124996 a(n) is the constant term in the expansion of Product_{k=1..n} (x^k + 1/x^k)^4.

Table of values

List of values