A346680 - cp's OEIS frontend

A346680 a(n) = Sum_{k=0..n} (-1)^(n-k) * binomial(4k,k) / (3k + 1).

n	a(n)
0	1
1	0
2	4
3	18
4	122
5	847
6	6237
7	47583
8	373149
9	2989111
10	24354777
11	201214021
12	1681719343
13	14193619647
14	120800146953
15	1035593096367
16	8934344395053
17	77510878324671
18	675799844685937
19	5918354494345863
20	52037647837001257
21	459200394617540288
22	4065477723321641932

[1, 0, 4, 18, 122, 847, 6237, 47583, 373149, 2989111, 24354777, 201214021, 1681719343, 14193619647, 120800146953, 1035593096367, 8934344395053, 77510878324671, 675799844685937, 5918354494345863, 52037647837001257, 459200394617540288, 4065477723321641932]

cp's OEIS Frontend

A346680 a(n) = Sum_{k=0..n} (-1)^(n-k) * binomial(4k,k) / (3k + 1).

Table of values

List of values

cp's OEIS Frontend

A346680 a(n) = Sum_{k=0..n} (-1)^(n-k) * binomial(4*k,k) / (3*k + 1).

Table of values

List of values

A346680 a(n) = Sum_{k=0..n} (-1)^(n-k) * binomial(4k,k) / (3k + 1).