A011926 - cp's OEIS frontend

A011926 a(n) = floor(n(n-1)(n-2)*(n-3)/16).

n	a(n)
0	0
1	0
2	0
3	0
4	1
5	7
6	22
7	52
8	105
9	189
10	315
11	495
12	742
13	1072
14	1501
15	2047
16	2730
17	3570
18	4590
19	5814
20	7267
21	8977
22	10972
23	13282
24	15939
25	18975
26	22425
27	26325
28	30712
29	35626
30	41107
31	47197
32	53940
33	61380
34	69564
35	78540

[0, 0, 0, 0, 1, 7, 22, 52, 105, 189, 315, 495, 742, 1072, 1501, 2047, 2730, 3570, 4590, 5814, 7267, 8977, 10972, 13282, 15939, 18975, 22425, 26325, 30712, 35626, 41107, 47197, 53940, 61380, 69564, 78540]

cp's OEIS Frontend

A011926 a(n) = floor(n(n-1)(n-2)*(n-3)/16).

Table of values

List of values

cp's OEIS Frontend

A011926 a(n) = floor(n*(n-1)*(n-2)*(n-3)/16).

Table of values

List of values

A011926 a(n) = floor(n(n-1)(n-2)*(n-3)/16).