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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.

A364756 Number of subsets of {1..n} containing n and some element equal to the sum of two distinct others.

Table of values

n a(n)
0 0
1 0
2 0
3 1
4 2
5 7
6 17
7 40
8 87
9 196
10 413
11 875
12 1812
13 3741
14 7640
15 15567
16 31493
17 63666
18 128284
19 257977
20 518045
21 1039478
22 2083719
23 4174586
24 8359837
25 16735079
26 33493780
27 67020261
28 134090173
29 268250256
30 536609131
31 1073358893
32 2146942626
33 4294183434
34 8588837984
35 17178273355

List of values

[0, 0, 0, 1, 2, 7, 17, 40, 87, 196, 413, 875, 1812, 3741, 7640, 15567, 31493, 63666, 128284, 257977, 518045, 1039478, 2083719, 4174586, 8359837, 16735079, 33493780, 67020261, 134090173, 268250256, 536609131, 1073358893, 2146942626, 4294183434, 8588837984, 17178273355]

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

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