A011919 - cp's OEIS frontend

A011919 a(n) = floor(n(n-1)(n-2)*(n-3)/9).

n	a(n)
0	0
1	0
2	0
3	0
4	2
5	13
6	40
7	93
8	186
9	336
10	560
11	880
12	1320
13	1906
14	2669
15	3640
16	4853
17	6346
18	8160
19	10336
20	12920
21	15960
22	19506
23	23613
24	28336
25	33733
26	39866
27	46800
28	54600
29	63336
30	73080
31	83906
32	95893
33	109120
34	123669
35	139626
36	157080
37	176120
38	196840
39	219336
40	243706
41	270053
42	298480

[0, 0, 0, 0, 2, 13, 40, 93, 186, 336, 560, 880, 1320, 1906, 2669, 3640, 4853, 6346, 8160, 10336, 12920, 15960, 19506, 23613, 28336, 33733, 39866, 46800, 54600, 63336, 73080, 83906, 95893, 109120, 123669, 139626, 157080, 176120, 196840, 219336, 243706, 270053, 298480]

cp's OEIS Frontend

A011919 a(n) = floor(n(n-1)(n-2)*(n-3)/9).

Table of values

List of values

cp's OEIS Frontend

A011919 a(n) = floor(n*(n-1)*(n-2)*(n-3)/9).

Table of values

List of values

A011919 a(n) = floor(n(n-1)(n-2)*(n-3)/9).