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This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A065795 Number of subsets of {1,2,...,n} that contain the average of their elements.

Table of values

n a(n)
1 1
2 2
3 4
4 6
5 10
6 16
7 26
8 42
9 72
10 124
11 218
12 390
13 706
14 1292
15 2388
16 4436
17 8292
18 15578
19 29376
20 55592
21 105532
22 200858
23 383220
24 732756
25 1403848
26 2694404
27 5179938
28 9973430
29 19229826
30 37125562
31 71762396
32 138871260
33 269021848
34 521666984
35 1012520400
36 1966957692
37 3824240848

List of values

[1, 2, 4, 6, 10, 16, 26, 42, 72, 124, 218, 390, 706, 1292, 2388, 4436, 8292, 15578, 29376, 55592, 105532, 200858, 383220, 732756, 1403848, 2694404, 5179938, 9973430, 19229826, 37125562, 71762396, 138871260, 269021848, 521666984, 1012520400, 1966957692, 3824240848]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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