A234277 - cp's OEIS frontend

A234277 a(n) = binomial(floor(n/2),4) + (ceiling(n/2)-3)*binomial(floor(n/2),3).

n	a(n)
0	0
1	0
2	0
3	0
4	0
5	0
6	0
7	1
8	5
9	9
10	25
11	35
12	75
13	95
14	175
15	210
16	350
17	406
18	630
19	714
20	1050
21	1170
22	1650
23	1815
24	2475
25	2695
26	3575
27	3861
28	5005
29	5369
30	6825
31	7280
32	9100
33	9660
34	11900
35	12580
36	15300
37	16116
38	19380
39	20349
40	24225
41	25365
42	29925
43	31255
44	36575
45	38115
46	44275
47	46046
48	53130
49	55154
50	63250
51	65550
52	74750
53	77350
54	87750
55	90675

[0, 0, 0, 0, 0, 0, 0, 1, 5, 9, 25, 35, 75, 95, 175, 210, 350, 406, 630, 714, 1050, 1170, 1650, 1815, 2475, 2695, 3575, 3861, 5005, 5369, 6825, 7280, 9100, 9660, 11900, 12580, 15300, 16116, 19380, 20349, 24225, 25365, 29925, 31255, 36575, 38115, 44275, 46046, 53130, 55154, 63250, 65550, 74750, 77350, 87750, 90675]

cp's OEIS Frontend

A234277 a(n) = binomial(floor(n/2),4) + (ceiling(n/2)-3)*binomial(floor(n/2),3).

Table of values

List of values