A330300 - cp's OEIS frontend

A330300 a(n) is the number of subsets of {1..n} that contain exactly 2 odd and 3 even numbers.

n	a(n)
0	0
1	0
2	0
3	0
4	0
5	0
6	3
7	6
8	24
9	40
10	100
11	150
12	300
13	420
14	735
15	980
16	1568
17	2016
18	3024
19	3780
20	5400
21	6600
22	9075
23	10890
24	14520
25	17160
26	22308
27	26026
28	33124
29	38220
30	47775
31	54600
32	67200
33	76160
34	92480
35	104040
36	124848
37	139536
38	165699
39	184110
40	216600
41	239400
42	279300
43	307230
44	355740
45	389620
46	448063

[0, 0, 0, 0, 0, 0, 3, 6, 24, 40, 100, 150, 300, 420, 735, 980, 1568, 2016, 3024, 3780, 5400, 6600, 9075, 10890, 14520, 17160, 22308, 26026, 33124, 38220, 47775, 54600, 67200, 76160, 92480, 104040, 124848, 139536, 165699, 184110, 216600, 239400, 279300, 307230, 355740, 389620, 448063]

cp's OEIS Frontend

A330300 a(n) is the number of subsets of {1..n} that contain exactly 2 odd and 3 even numbers.

Table of values

List of values