A339484 - cp's OEIS frontend

A339484 Number of subsets of {1..n} whose cardinality is equal to the average of the elements.

n	a(n)
1	1
2	1
3	2
4	3
5	4
6	7
7	11
8	17
9	28
10	47
11	80
12	139
13	245
14	436
15	784
16	1419
17	2585
18	4738
19	8729
20	16154
21	30015
22	55966
23	104682
24	196378
25	369384
26	696494
27	1316252
28	2492683
29	4729673
30	8990374
31	17118020
32	32644544
33	62345875
34	119235519
35	228333179
36	437790086
37	840362539
38	1614894770
39	3106516468

[1, 1, 2, 3, 4, 7, 11, 17, 28, 47, 80, 139, 245, 436, 784, 1419, 2585, 4738, 8729, 16154, 30015, 55966, 104682, 196378, 369384, 696494, 1316252, 2492683, 4729673, 8990374, 17118020, 32644544, 62345875, 119235519, 228333179, 437790086, 840362539, 1614894770, 3106516468]

cp's OEIS Frontend

A339484 Number of subsets of {1..n} whose cardinality is equal to the average of the elements.

Table of values

List of values