A347855 - cp's OEIS frontend

A347855 a(n) = (4n)!/((2n)!(n)!) (n/3)!/(4*n/3)!.

n	a(n)
0	1
1	9
2	189
3	4620
4	120285
5	3241134
6	89237148
7	2493521172
8	70429218525
9	2005604901300
10	57481750139814
11	1656023714623980
12	47913489552349980
13	1391243084942932620
14	40519970408738302020
15	1183237138556438547120

[1, 9, 189, 4620, 120285, 3241134, 89237148, 2493521172, 70429218525, 2005604901300, 57481750139814, 1656023714623980, 47913489552349980, 1391243084942932620, 40519970408738302020, 1183237138556438547120]

cp's OEIS Frontend

A347855 a(n) = (4n)!/((2n)!(n)!) (n/3)!/(4*n/3)!.

Table of values

List of values

cp's OEIS Frontend

A347855 a(n) = (4*n)!/((2*n)!*(n)!) * (n/3)!/(4*n/3)!.

Table of values

List of values

A347855 a(n) = (4n)!/((2n)!(n)!) (n/3)!/(4*n/3)!.