A330298 - cp's OEIS frontend

A330298 a(n) is the number of subsets of {1..n} that contain exactly 1 odd and 2 even numbers.

n	a(n)
0	0
1	0
2	0
3	0
4	2
5	3
6	9
7	12
8	24
9	30
10	50
11	60
12	90
13	105
14	147
15	168
16	224
17	252
18	324
19	360
20	450
21	495
22	605
23	660
24	792
25	858
26	1014
27	1092
28	1274
29	1365
30	1575
31	1680
32	1920
33	2040
34	2312
35	2448
36	2754
37	2907
38	3249
39	3420
40	3800
41	3990
42	4410
43	4620
44	5082
45	5313
46	5819
47	6072
48	6624
49	6900
50	7500
51	7800
52	8450
53	8775
54	9477

[0, 0, 0, 0, 2, 3, 9, 12, 24, 30, 50, 60, 90, 105, 147, 168, 224, 252, 324, 360, 450, 495, 605, 660, 792, 858, 1014, 1092, 1274, 1365, 1575, 1680, 1920, 2040, 2312, 2448, 2754, 2907, 3249, 3420, 3800, 3990, 4410, 4620, 5082, 5313, 5819, 6072, 6624, 6900, 7500, 7800, 8450, 8775, 9477]

cp's OEIS Frontend

A330298 a(n) is the number of subsets of {1..n} that contain exactly 1 odd and 2 even numbers.

Table of values

List of values