A383282 - cp's OEIS frontend

A383282 a(n) = Sum_{k=0..n} (2k+1) (-1/2)^(n+k) * (2k)! (n-k)! * binomial(n,k)^2.

n	a(n)
0	1
1	1
2	5
3	51
4	906
5	24690
6	956790
7	49993650
8	3387124440
9	288755250840
10	30247310482200
11	3818739956308200
12	571858101118458000
13	100218359688123877200
14	20319306632495415745200
15	4719164981053010642154000
16	1244680987088062472732784000
17	369981708267221405777101680000

[1, 1, 5, 51, 906, 24690, 956790, 49993650, 3387124440, 288755250840, 30247310482200, 3818739956308200, 571858101118458000, 100218359688123877200, 20319306632495415745200, 4719164981053010642154000, 1244680987088062472732784000, 369981708267221405777101680000]

cp's OEIS Frontend

A383282 a(n) = Sum_{k=0..n} (2k+1) (-1/2)^(n+k) * (2k)! (n-k)! * binomial(n,k)^2.

Table of values

List of values

cp's OEIS Frontend

A383282 a(n) = Sum_{k=0..n} (2*k+1) * (-1/2)^(n+k) * (2*k)! * (n-k)! * binomial(n,k)^2.

Table of values

List of values

A383282 a(n) = Sum_{k=0..n} (2k+1) (-1/2)^(n+k) * (2k)! (n-k)! * binomial(n,k)^2.