A011909 - cp's OEIS frontend

A011909 a(n) = floor( n(n-1)(n-2)/27 ).

n	a(n)
0	0
1	0
2	0
3	0
4	0
5	2
6	4
7	7
8	12
9	18
10	26
11	36
12	48
13	63
14	80
15	101
16	124
17	151
18	181
19	215
20	253
21	295
22	342
23	393
24	449
25	511
26	577
27	650
28	728
29	812
30	902
31	998
32	1102
33	1212
34	1329
35	1454
36	1586
37	1726
38	1874
39	2030
40	2195
41	2368
42	2551
43	2742
44	2943
45	3153
46	3373
47	3603
48	3843
49	4094
50	4355
51	4627
52	4911
53	5205
54	5512
55	5830
56	6160
57	6502
58	6856
59	7224
60	7604
61	7997
62	8404
63	8824
64	9258
65	9706
66	10168
67	10645
68	11136

[0, 0, 0, 0, 0, 2, 4, 7, 12, 18, 26, 36, 48, 63, 80, 101, 124, 151, 181, 215, 253, 295, 342, 393, 449, 511, 577, 650, 728, 812, 902, 998, 1102, 1212, 1329, 1454, 1586, 1726, 1874, 2030, 2195, 2368, 2551, 2742, 2943, 3153, 3373, 3603, 3843, 4094, 4355, 4627, 4911, 5205, 5512, 5830, 6160, 6502, 6856, 7224, 7604, 7997, 8404, 8824, 9258, 9706, 10168, 10645, 11136]

cp's OEIS Frontend

A011909 a(n) = floor( n(n-1)(n-2)/27 ).

Table of values

List of values

cp's OEIS Frontend

A011909 a(n) = floor( n*(n-1)*(n-2)/27 ).

Table of values

List of values

A011909 a(n) = floor( n(n-1)(n-2)/27 ).