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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.

A326116 Number of subsets of {2..n} containing no products of two or more distinct elements.

Table of values

n a(n)
1 1
2 2
3 4
4 8
5 16
6 28
7 56
8 100
9 200
10 364
11 728
12 1232
13 2464
14 4592
15 8296
16 15920
17 31840
18 55952
19 111904
20 195712
21 362336
22 697360
23 1394720
24 2334112
25 4668224
26 9095392
27 17225312
28 31242784
29 62485568
30 106668608
31 213337216
32 392606528
33 755131840
34 1491146912
35 2727555424
36 4947175712

List of values

[1, 2, 4, 8, 16, 28, 56, 100, 200, 364, 728, 1232, 2464, 4592, 8296, 15920, 31840, 55952, 111904, 195712, 362336, 697360, 1394720, 2334112, 4668224, 9095392, 17225312, 31242784, 62485568, 106668608, 213337216, 392606528, 755131840, 1491146912, 2727555424, 4947175712]

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

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