A011902 - cp's OEIS frontend

A011902 a(n) = floor( n(n-1)(n-2)/20 ).

n	a(n)
0	0
1	0
2	0
3	0
4	1
5	3
6	6
7	10
8	16
9	25
10	36
11	49
12	66
13	85
14	109
15	136
16	168
17	204
18	244
19	290
20	342
21	399
22	462
23	531
24	607
25	690
26	780
27	877
28	982
29	1096
30	1218
31	1348
32	1488
33	1636
34	1795
35	1963
36	2142
37	2331
38	2530
39	2741
40	2964
41	3198
42	3444
43	3702
44	3973
45	4257
46	4554
47	4864
48	5188
49	5527
50	5880
51	6247
52	6630
53	7027
54	7441
55	7870
56	8316
57	8778
58	9256
59	9752
60	10266
61	10797
62	11346
63	11913
64	12499
65	13104
66	13728
67	14371

[0, 0, 0, 0, 1, 3, 6, 10, 16, 25, 36, 49, 66, 85, 109, 136, 168, 204, 244, 290, 342, 399, 462, 531, 607, 690, 780, 877, 982, 1096, 1218, 1348, 1488, 1636, 1795, 1963, 2142, 2331, 2530, 2741, 2964, 3198, 3444, 3702, 3973, 4257, 4554, 4864, 5188, 5527, 5880, 6247, 6630, 7027, 7441, 7870, 8316, 8778, 9256, 9752, 10266, 10797, 11346, 11913, 12499, 13104, 13728, 14371]

cp's OEIS Frontend

A011902 a(n) = floor( n(n-1)(n-2)/20 ).

Table of values

List of values

cp's OEIS Frontend

A011902 a(n) = floor( n*(n-1)*(n-2)/20 ).

Table of values

List of values

A011902 a(n) = floor( n(n-1)(n-2)/20 ).