A028723 - cp's OEIS frontend

A028723 a(n) = (1/4)floor(n/2)floor((n-1)/2)floor((n-2)/2)floor((n-3)/2).

n	a(n)
0	0
1	0
2	0
3	0
4	0
5	1
6	3
7	9
8	18
9	36
10	60
11	100
12	150
13	225
14	315
15	441
16	588
17	784
18	1008
19	1296
20	1620
21	2025
22	2475
23	3025
24	3630
25	4356
26	5148
27	6084
28	7098
29	8281
30	9555
31	11025
32	12600
33	14400
34	16320
35	18496
36	20808
37	23409
38	26163
39	29241
40	32490
41	36100
42	39900
43	44100
44	48510
45	53361
46	58443

[0, 0, 0, 0, 0, 1, 3, 9, 18, 36, 60, 100, 150, 225, 315, 441, 588, 784, 1008, 1296, 1620, 2025, 2475, 3025, 3630, 4356, 5148, 6084, 7098, 8281, 9555, 11025, 12600, 14400, 16320, 18496, 20808, 23409, 26163, 29241, 32490, 36100, 39900, 44100, 48510, 53361, 58443]

cp's OEIS Frontend

A028723 a(n) = (1/4)floor(n/2)floor((n-1)/2)floor((n-2)/2)floor((n-3)/2).

Table of values

List of values

cp's OEIS Frontend

A028723 a(n) = (1/4)*floor(n/2)*floor((n-1)/2)*floor((n-2)/2)*floor((n-3)/2).

Table of values

List of values

A028723 a(n) = (1/4)floor(n/2)floor((n-1)/2)floor((n-2)/2)floor((n-3)/2).