A346665 - cp's OEIS frontend

A346665 a(n) = Sum_{k=0..n} (-1)^(n-k) * binomial(n,k) * binomial(5k,k) / (4k + 1).

n	a(n)
0	1
1	0
2	4
3	22
4	172
5	1409
6	12216
7	109904
8	1016876
9	9614584
10	92490261
11	902364918
12	8907507708
13	88802649446
14	892833960460
15	9042639746819
16	92171773008828
17	944819352291920
18	9733592874215112
19	100725697334689896
20	1046535959932600141
21	10913073121311627481
22	114175868855824821752

[1, 0, 4, 22, 172, 1409, 12216, 109904, 1016876, 9614584, 92490261, 902364918, 8907507708, 88802649446, 892833960460, 9042639746819, 92171773008828, 944819352291920, 9733592874215112, 100725697334689896, 1046535959932600141, 10913073121311627481, 114175868855824821752]

cp's OEIS Frontend

A346665 a(n) = Sum_{k=0..n} (-1)^(n-k) * binomial(n,k) * binomial(5k,k) / (4k + 1).

Table of values

List of values

cp's OEIS Frontend

A346665 a(n) = Sum_{k=0..n} (-1)^(n-k) * binomial(n,k) * binomial(5*k,k) / (4*k + 1).

Table of values

List of values

A346665 a(n) = Sum_{k=0..n} (-1)^(n-k) * binomial(n,k) * binomial(5k,k) / (4k + 1).