A011903 - cp's OEIS frontend

A011903 a(n) = floor(n(n-1)(n-2)/21).

n	a(n)
0	0
1	0
2	0
3	0
4	1
5	2
6	5
7	10
8	16
9	24
10	34
11	47
12	62
13	81
14	104
15	130
16	160
17	194
18	233
19	276
20	325
21	380
22	440
23	506
24	578
25	657
26	742
27	835
28	936
29	1044
30	1160
31	1284
32	1417
33	1558
34	1709
35	1870
36	2040
37	2220
38	2410
39	2611
40	2822
41	3045
42	3280

[0, 0, 0, 0, 1, 2, 5, 10, 16, 24, 34, 47, 62, 81, 104, 130, 160, 194, 233, 276, 325, 380, 440, 506, 578, 657, 742, 835, 936, 1044, 1160, 1284, 1417, 1558, 1709, 1870, 2040, 2220, 2410, 2611, 2822, 3045, 3280]

cp's OEIS Frontend

A011903 a(n) = floor(n(n-1)(n-2)/21).

Table of values

List of values

cp's OEIS Frontend

A011903 a(n) = floor(n*(n-1)*(n-2)/21).

Table of values

List of values

A011903 a(n) = floor(n(n-1)(n-2)/21).