A211420 - cp's OEIS frontend

A211420 a(n) = (8n)!n!/((4n)!(3n)!(2*n)!).

n	a(n)
0	1
1	140
2	60060
3	29745716
4	15628090140
5	8480843582640
6	4697400936504900
7	2638798257262351800
8	1497753729733989900060
9	856840435680656569701776
10	493243073668546377605912560
11	285369375758780754651194529300
12	165789876049841088844342275759300

[1, 140, 60060, 29745716, 15628090140, 8480843582640, 4697400936504900, 2638798257262351800, 1497753729733989900060, 856840435680656569701776, 493243073668546377605912560, 285369375758780754651194529300, 165789876049841088844342275759300]

cp's OEIS Frontend

A211420 a(n) = (8n)!n!/((4n)!(3n)!(2*n)!).

Table of values

List of values

cp's OEIS Frontend

A211420 a(n) = (8*n)!*n!/((4*n)!*(3*n)!*(2*n)!).

Table of values

List of values

A211420 a(n) = (8n)!n!/((4n)!(3n)!(2*n)!).