A379022 - cp's OEIS frontend

A379022 a(n) = Sum_{k=0..n} binomial(2n+k-1,k) binomial(2*n+k,n-k).

n	a(n)
0	1
1	4
2	36
3	370
4	4012
5	44824
6	510498
7	5892310
8	68684540
9	806715964
10	9532070396
11	113179713046
12	1349276883346
13	16140148109960
14	193629588953214
15	2328744593780590
16	28068490664161756
17	338960821947139640
18	4100329281075440400
19	49676100591186493156
20	602654837914634224812

[1, 4, 36, 370, 4012, 44824, 510498, 5892310, 68684540, 806715964, 9532070396, 113179713046, 1349276883346, 16140148109960, 193629588953214, 2328744593780590, 28068490664161756, 338960821947139640, 4100329281075440400, 49676100591186493156, 602654837914634224812]

cp's OEIS Frontend

A379022 a(n) = Sum_{k=0..n} binomial(2n+k-1,k) binomial(2*n+k,n-k).

Table of values

List of values

cp's OEIS Frontend

A379022 a(n) = Sum_{k=0..n} binomial(2*n+k-1,k) * binomial(2*n+k,n-k).

Table of values

List of values

A379022 a(n) = Sum_{k=0..n} binomial(2n+k-1,k) binomial(2*n+k,n-k).