A330299 - cp's OEIS frontend

A330299 a(n) is the number of subsets of {1..n} that contain exactly 1 odd and 3 even numbers.

n	a(n)
0	0
1	0
2	0
3	0
4	0
5	0
6	3
7	4
8	16
9	20
10	50
11	60
12	120
13	140
14	245
15	280
16	448
17	504
18	756
19	840
20	1200
21	1320
22	1815
23	1980
24	2640
25	2860
26	3718
27	4004
28	5096
29	5460
30	6825
31	7280
32	8960
33	9520
34	11560
35	12240
36	14688
37	15504
38	18411
39	19380
40	22800
41	23940
42	27930
43	29260
44	33880
45	35420
46	40733
47	42504
48	48576
49	50600
50	57500

[0, 0, 0, 0, 0, 0, 3, 4, 16, 20, 50, 60, 120, 140, 245, 280, 448, 504, 756, 840, 1200, 1320, 1815, 1980, 2640, 2860, 3718, 4004, 5096, 5460, 6825, 7280, 8960, 9520, 11560, 12240, 14688, 15504, 18411, 19380, 22800, 23940, 27930, 29260, 33880, 35420, 40733, 42504, 48576, 50600, 57500]

cp's OEIS Frontend

A330299 a(n) is the number of subsets of {1..n} that contain exactly 1 odd and 3 even numbers.

Table of values

List of values