A161149 - cp's OEIS frontend

A161149 a(n) = (2n)!(2n+1)!/n! = n!A000909(n), n=0,1...

n	a(n)
0	1
1	12
2	1440
3	604800
4	609638400
5	1207084032000
6	4142712397824000
7	22619209692119040000
8	184572751087691366400000
9	2146211949647675208499200000
10	34253542716376896327647232000000
11	727956289808441800755158974464000000
12	20091593598712993700842387695206400000000

[1, 12, 1440, 604800, 609638400, 1207084032000, 4142712397824000, 22619209692119040000, 184572751087691366400000, 2146211949647675208499200000, 34253542716376896327647232000000, 727956289808441800755158974464000000, 20091593598712993700842387695206400000000]

cp's OEIS Frontend

A161149 a(n) = (2n)!(2n+1)!/n! = n!A000909(n), n=0,1...

Table of values

List of values

cp's OEIS Frontend

A161149 a(n) = (2*n)!*(2*n+1)!/n! = n!*A000909(n), n=0,1...

Table of values

List of values

A161149 a(n) = (2n)!(2n+1)!/n! = n!A000909(n), n=0,1...