A120666 - cp's OEIS frontend

A120666 Triangle read by rows: T(n, k) = (n*k)!/(n!)^k.

n	a(n)
1	1
2	1
3	6
4	1
5	20
6	1680
7	1
8	70
9	34650
10	63063000
11	1
12	252
13	756756
14	11732745024
15	623360743125120
16	1
17	924
18	17153136
19	2308743493056
20	1370874167589326400
21	2670177736637149247308800
22	1
23	3432
24	399072960
25	472518347558400
26	3177459078523411968000
27	85722533226982363751829504000
28	7363615666157189603982585462030336000

[1, 1, 6, 1, 20, 1680, 1, 70, 34650, 63063000, 1, 252, 756756, 11732745024, 623360743125120, 1, 924, 17153136, 2308743493056, 1370874167589326400, 2670177736637149247308800, 1, 3432, 399072960, 472518347558400, 3177459078523411968000, 85722533226982363751829504000, 7363615666157189603982585462030336000]

cp's OEIS Frontend

A120666 Triangle read by rows: T(n, k) = (n*k)!/(n!)^k.

Table of values

List of values