A361712 - cp's OEIS frontend

A361712 a(n) = Sum_{k = 0..n-1} binomial(n,k)^2binomial(n+k,k)binomial(n+k-1,k).

n	a(n)
0	0
1	1
2	25
3	649
4	16921
5	448751
6	12160177
7	336745053
8	9513822745
9	273585035755
10	7988828082775
11	236367018090017
12	7072779699975601
13	213701611408357567
14	6511338458568750853
15	199850727914988936149
16	6173376842290368719385
17	191776434791965521115235
18	5987554996434696230487955

[0, 1, 25, 649, 16921, 448751, 12160177, 336745053, 9513822745, 273585035755, 7988828082775, 236367018090017, 7072779699975601, 213701611408357567, 6511338458568750853, 199850727914988936149, 6173376842290368719385, 191776434791965521115235, 5987554996434696230487955]

cp's OEIS Frontend

A361712 a(n) = Sum_{k = 0..n-1} binomial(n,k)^2binomial(n+k,k)binomial(n+k-1,k).

Table of values

List of values

cp's OEIS Frontend

A361712 a(n) = Sum_{k = 0..n-1} binomial(n,k)^2*binomial(n+k,k)*binomial(n+k-1,k).

Table of values

List of values

A361712 a(n) = Sum_{k = 0..n-1} binomial(n,k)^2binomial(n+k,k)binomial(n+k-1,k).