A350881 - cp's OEIS frontend

A350881 a(n) is the constant term in expansion of Product_{k=1..n} (x^prime(k) + 1/x^prime(k))^2.

n	a(n)
0	1
1	2
2	4
3	10
4	24
5	50
6	140
7	368
8	1152
9	3682
10	11784
11	39902
12	134612
13	463066
14	1635092
15	5818384
16	20684072
17	73693068
18	266943648
19	967762792
20	3533666568
21	13036452946
22	48102671884
23	178315730764
24	661567489568
25	2450447537226
26	9123572154720
27	34201574126260

[1, 2, 4, 10, 24, 50, 140, 368, 1152, 3682, 11784, 39902, 134612, 463066, 1635092, 5818384, 20684072, 73693068, 266943648, 967762792, 3533666568, 13036452946, 48102671884, 178315730764, 661567489568, 2450447537226, 9123572154720, 34201574126260]

cp's OEIS Frontend

A350881 a(n) is the constant term in expansion of Product_{k=1..n} (x^prime(k) + 1/x^prime(k))^2.

Table of values

List of values