A333319 - cp's OEIS frontend

A333319 a(n) is the number of subsets of {1..n} that contain exactly 3 odd and 1 even numbers.

n	a(n)
0	0
1	0
2	0
3	0
4	0
5	2
6	3
7	12
8	16
9	40
10	50
11	100
12	120
13	210
14	245
15	392
16	448
17	672
18	756
19	1080
20	1200
21	1650
22	1815
23	2420
24	2640
25	3432
26	3718
27	4732
28	5096
29	6370
30	6825
31	8400
32	8960
33	10880
34	11560
35	13872
36	14688
37	17442
38	18411
39	21660
40	22800
41	26600
42	27930
43	32340
44	33880
45	38962
46	40733
47	46552

[0, 0, 0, 0, 0, 2, 3, 12, 16, 40, 50, 100, 120, 210, 245, 392, 448, 672, 756, 1080, 1200, 1650, 1815, 2420, 2640, 3432, 3718, 4732, 5096, 6370, 6825, 8400, 8960, 10880, 11560, 13872, 14688, 17442, 18411, 21660, 22800, 26600, 27930, 32340, 33880, 38962, 40733, 46552]

cp's OEIS Frontend

A333319 a(n) is the number of subsets of {1..n} that contain exactly 3 odd and 1 even numbers.

Table of values

List of values