A001193 - cp's OEIS frontend

A001193 a(n) = (n+1)(2n)!/(2^nn!) = (n+1)(2n-1)!!.

n	a(n)
0	1
1	2
2	9
3	60
4	525
5	5670
6	72765
7	1081080
8	18243225
9	344594250
10	7202019825
11	164991726900
12	4111043861925
13	110681950128750
14	3201870700153125
15	99044533658070000
16	3262279327362680625
17	113987877673731311250
18	4211218814057295665625
19	164015890652757831187500

[1, 2, 9, 60, 525, 5670, 72765, 1081080, 18243225, 344594250, 7202019825, 164991726900, 4111043861925, 110681950128750, 3201870700153125, 99044533658070000, 3262279327362680625, 113987877673731311250, 4211218814057295665625, 164015890652757831187500]

cp's OEIS Frontend

A001193 a(n) = (n+1)(2n)!/(2^nn!) = (n+1)(2n-1)!!.

Table of values

List of values

cp's OEIS Frontend

A001193 a(n) = (n+1)*(2*n)!/(2^n*n!) = (n+1)*(2n-1)!!.

Table of values

List of values

A001193 a(n) = (n+1)(2n)!/(2^nn!) = (n+1)(2n-1)!!.