A277860 - cp's OEIS frontend

A277860 a(n) = Sum_{k=0..n-1} binomial(4k, 2k+1)binomial(2k, k)48^(n-1-k).

n	a(n)
1	0
2	8
3	720
4	50400
5	3220000
6	196885920
7	11756961216
8	692835631488
9	40536961717824
10	2363784447147552
11	137716866109432896
12	8030173585594013568
13	469162781054378536320
14	27486632292027996114560
15	1615617140290621588826880
16	95302760085090826490672640

[0, 8, 720, 50400, 3220000, 196885920, 11756961216, 692835631488, 40536961717824, 2363784447147552, 137716866109432896, 8030173585594013568, 469162781054378536320, 27486632292027996114560, 1615617140290621588826880, 95302760085090826490672640]

cp's OEIS Frontend

A277860 a(n) = Sum_{k=0..n-1} binomial(4k, 2k+1)binomial(2k, k)48^(n-1-k).

Table of values

List of values

cp's OEIS Frontend

A277860 a(n) = Sum_{k=0..n-1} binomial(4k, 2k+1)*binomial(2k, k)*48^(n-1-k).

Table of values

List of values

A277860 a(n) = Sum_{k=0..n-1} binomial(4k, 2k+1)binomial(2k, k)48^(n-1-k).