A159960 - cp's OEIS frontend

A159960 a(n) = (1/2) * Sum_{k=1..n} (-1)^(k-1) * binomial(2n-k, k) binomial(n, k) * 2^k * (2n-2k)!.

n	a(n)
1	1
2	10
3	292
4	16152
5	1443616
6	189709600
7	34420171584
8	8241995095936
9	2517637537094656
10	955377719901439488
11	440888939541736115200
12	243144648530111594371072
13	157920570527279020394569728
14	119308432982412667510831095808
15	103738687936577909824307104989184

[1, 10, 292, 16152, 1443616, 189709600, 34420171584, 8241995095936, 2517637537094656, 955377719901439488, 440888939541736115200, 243144648530111594371072, 157920570527279020394569728, 119308432982412667510831095808, 103738687936577909824307104989184]

cp's OEIS Frontend

A159960 a(n) = (1/2) * Sum_{k=1..n} (-1)^(k-1) * binomial(2n-k, k) binomial(n, k) * 2^k * (2n-2k)!.

Table of values

List of values

cp's OEIS Frontend

A159960 a(n) = (1/2) * Sum_{k=1..n} (-1)^(k-1) * binomial(2*n-k, k) * binomial(n, k) * 2^k * (2*n-2*k)!.

Table of values

List of values

A159960 a(n) = (1/2) * Sum_{k=1..n} (-1)^(k-1) * binomial(2n-k, k) binomial(n, k) * 2^k * (2n-2k)!.