A262910 - cp's OEIS frontend

A262910 a(n) = Sum_{k=0..n} binomial(k+n-1,k)binomial(k+n,2k).

n	a(n)
0	1
1	2
2	10
3	59
4	366
5	2337
6	15205
7	100235
8	667222
9	4474733
10	30188335
11	204646532
12	1392850785
13	9511878729
14	65144238981
15	447263887479
16	3077459618886
17	21215286546705
18	146500755609415
19	1013180180867125
20	7016536189029551
21	48650933146617728
22	337709155342663620

[1, 2, 10, 59, 366, 2337, 15205, 100235, 667222, 4474733, 30188335, 204646532, 1392850785, 9511878729, 65144238981, 447263887479, 3077459618886, 21215286546705, 146500755609415, 1013180180867125, 7016536189029551, 48650933146617728, 337709155342663620]

cp's OEIS Frontend

A262910 a(n) = Sum_{k=0..n} binomial(k+n-1,k)binomial(k+n,2k).

Table of values

List of values

cp's OEIS Frontend

A262910 a(n) = Sum_{k=0..n} binomial(k+n-1,k)*binomial(k+n,2*k).

Table of values

List of values

A262910 a(n) = Sum_{k=0..n} binomial(k+n-1,k)binomial(k+n,2k).