A362676 - cp's OEIS frontend

A362676 a(n) = Sum_{k = 0..n} 4^(n-k)binomial(n,k)binomial(n-1,k)binomial(2k,k).

n	a(n)
0	1
1	4
2	32
3	328
4	3840
5	48504
6	641984
7	8765712
8	122370048
9	1736921560
10	24975268032
11	362872728816
12	5317470233088
13	78479369810352
14	1165299414952320
15	17393306836535328
16	260791399517110272
17	3925811865435871896
18	59305018671515758784

[1, 4, 32, 328, 3840, 48504, 641984, 8765712, 122370048, 1736921560, 24975268032, 362872728816, 5317470233088, 78479369810352, 1165299414952320, 17393306836535328, 260791399517110272, 3925811865435871896, 59305018671515758784]

cp's OEIS Frontend

A362676 a(n) = Sum_{k = 0..n} 4^(n-k)binomial(n,k)binomial(n-1,k)binomial(2k,k).

Table of values

List of values

cp's OEIS Frontend

A362676 a(n) = Sum_{k = 0..n} 4^(n-k)*binomial(n,k)*binomial(n-1,k)*binomial(2*k,k).

Table of values

List of values

A362676 a(n) = Sum_{k = 0..n} 4^(n-k)binomial(n,k)binomial(n-1,k)binomial(2k,k).