A159914 - cp's OEIS frontend

A159914 Half the number of (n-3)-element subsets of {1,...,n} whose elements sum up to an odd value.

n	a(n)
0	0
1	0
2	0
3	0
4	1
5	3
6	5
7	8
8	14
9	22
10	30
11	40
12	55
13	73
14	91
15	112
16	140
17	172
18	204
19	240
20	285
21	335
22	385
23	440
24	506
25	578
26	650
27	728
28	819
29	917
30	1015
31	1120
32	1240
33	1368
34	1496
35	1632
36	1785
37	1947
38	2109
39	2280
40	2470
41	2670
42	2870
43	3080
44	3311
45	3553
46	3795
47	4048
48	4324
49	4612
50	4900
51	5200

[0, 0, 0, 0, 1, 3, 5, 8, 14, 22, 30, 40, 55, 73, 91, 112, 140, 172, 204, 240, 285, 335, 385, 440, 506, 578, 650, 728, 819, 917, 1015, 1120, 1240, 1368, 1496, 1632, 1785, 1947, 2109, 2280, 2470, 2670, 2870, 3080, 3311, 3553, 3795, 4048, 4324, 4612, 4900, 5200]

cp's OEIS Frontend

A159914 Half the number of (n-3)-element subsets of {1,...,n} whose elements sum up to an odd value.

Table of values

List of values