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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.

A153788 Number of proper divisors of the Catalan number A000108(n).

Table of values

n a(n)
0 0
1 0
2 1
3 1
4 3
5 7
6 11
7 7
8 15
9 15
10 23
11 31
12 47
13 71
14 191
15 95
16 191
17 255
18 575
19 511
20 767
21 767
22 1023
23 1151
24 1151
25 1727
26 1535
27 1535
28 4095
29 4095
30 5119
31 2047
32 6143
33 12287
34 12287
35 8191
36 12287
37 12287
38 24575
39 24575
40 36863
41 98303
42 131071
43 147455

List of values

[0, 0, 1, 1, 3, 7, 11, 7, 15, 15, 23, 31, 47, 71, 191, 95, 191, 255, 575, 511, 767, 767, 1023, 1151, 1151, 1727, 1535, 1535, 4095, 4095, 5119, 2047, 6143, 12287, 12287, 8191, 12287, 12287, 24575, 24575, 36863, 98303, 131071, 147455]

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

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