A386941 - cp's OEIS frontend

A386941 a(n) = Sum_{k=0..n} (2k+1) binomial(2k,k) binomial(2*n-k-1,n-k).

n	a(n)
0	1
1	7
2	45
3	276
4	1645
5	9618
6	55468
7	316620
8	1792989
9	10089420
10	56482998
11	314859636
12	1748876220
13	9684449908
14	53487036420
15	294732771280
16	1620825793053
17	8897604701130
18	48766676365204
19	266905699036900
20	1458941915879910
21	7965552023094600
22	43444688665988700

[1, 7, 45, 276, 1645, 9618, 55468, 316620, 1792989, 10089420, 56482998, 314859636, 1748876220, 9684449908, 53487036420, 294732771280, 1620825793053, 8897604701130, 48766676365204, 266905699036900, 1458941915879910, 7965552023094600, 43444688665988700]

cp's OEIS Frontend

A386941 a(n) = Sum_{k=0..n} (2k+1) binomial(2k,k) binomial(2*n-k-1,n-k).

Table of values

List of values

cp's OEIS Frontend

A386941 a(n) = Sum_{k=0..n} (2*k+1) * binomial(2*k,k) * binomial(2*n-k-1,n-k).

Table of values

List of values

A386941 a(n) = Sum_{k=0..n} (2k+1) binomial(2k,k) binomial(2*n-k-1,n-k).