A011938 - cp's OEIS frontend

A011938 a(n) = floor( n(n-1)(n-2)*(n-3)/28 ).

n	a(n)
0	0
1	0
2	0
3	0
4	0
5	4
6	12
7	30
8	60
9	108
10	180
11	282
12	424
13	612
14	858
15	1170
16	1560
17	2040
18	2622
19	3322
20	4152
21	5130
22	6270
23	7590
24	9108
25	10842
26	12814
27	15042
28	17550
29	20358
30	23490
31	26970
32	30822
33	35074
34	39750
35	44880
36	50490
37	56610
38	63270
39	70500
40	78334
41	86802
42	95940
43	105780

[0, 0, 0, 0, 0, 4, 12, 30, 60, 108, 180, 282, 424, 612, 858, 1170, 1560, 2040, 2622, 3322, 4152, 5130, 6270, 7590, 9108, 10842, 12814, 15042, 17550, 20358, 23490, 26970, 30822, 35074, 39750, 44880, 50490, 56610, 63270, 70500, 78334, 86802, 95940, 105780]

cp's OEIS Frontend

A011938 a(n) = floor( n(n-1)(n-2)*(n-3)/28 ).

Table of values

List of values

cp's OEIS Frontend

A011938 a(n) = floor( n*(n-1)*(n-2)*(n-3)/28 ).

Table of values

List of values

A011938 a(n) = floor( n(n-1)(n-2)*(n-3)/28 ).