A344399 - cp's OEIS frontend

A344399 a(n) = 4^nbinomial(n - 1/2, -1/2)(n^2 + 1).

n	a(n)
0	1
1	4
2	30
3	200
4	1190
5	6552
6	34188
7	171600
8	836550
9	3986840
10	18660356
11	86062704
12	392102620
13	1768102000
14	7902970200
15	35056559520
16	154477660230
17	676745803800
18	2949418972500
19	12794985495600
20	55276458056820
21	237909980502480
22	1020487997404200
23	4363718285628000

[1, 4, 30, 200, 1190, 6552, 34188, 171600, 836550, 3986840, 18660356, 86062704, 392102620, 1768102000, 7902970200, 35056559520, 154477660230, 676745803800, 2949418972500, 12794985495600, 55276458056820, 237909980502480, 1020487997404200, 4363718285628000]

cp's OEIS Frontend

A344399 a(n) = 4^nbinomial(n - 1/2, -1/2)(n^2 + 1).

Table of values

List of values

cp's OEIS Frontend

A344399 a(n) = 4^n*binomial(n - 1/2, -1/2)*(n^2 + 1).

Table of values

List of values

A344399 a(n) = 4^nbinomial(n - 1/2, -1/2)(n^2 + 1).