A383281 - cp's OEIS frontend

A383281 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	2
2	11
3	120
4	2202
5	61260
6	2407770
7	127116360
8	8680455000
9	744631438320
10	78393873940200
11	9938444069030400
12	1493483322288157200
13	262511581007832156000
14	53360641241377862792400
15	12420661873849173800856000
16	3282370875452495120806512000
17	977378127650967704776130016000

[1, 2, 11, 120, 2202, 61260, 2407770, 127116360, 8680455000, 744631438320, 78393873940200, 9938444069030400, 1493483322288157200, 262511581007832156000, 53360641241377862792400, 12420661873849173800856000, 3282370875452495120806512000, 977378127650967704776130016000]

cp's OEIS Frontend

A383281 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

A383281 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

A383281 a(n) = Sum_{k=0..n} (2k+1) (1/2)^(n+k) * (2k)! (n-k)! * binomial(n,k)^2.