cp's OEIS Frontend

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.

A121612 Numbers k such that the number of prime divisors of the k-th Catalan number (counted with multiplicity) divides k.

Table of values

n a(n)
1 2
2 3
3 4
4 8
5 10
6 12
7 16
8 20
9 22
10 117
11 408
12 432
13 444
14 492
15 504
16 508
17 1555
18 1560
19 1605
20 1675
21 1790
22 5832
23 5940
24 5976
25 6048
26 6078
27 6102
28 6108
29 6132
30 6138
31 21175
32 21266
33 21280
34 21301
35 21434
36 21462
37 21469
38 21616
39 21623
40 21749
41 21770
42 21784
43 81472
44 81528
45 81648

List of values

[2, 3, 4, 8, 10, 12, 16, 20, 22, 117, 408, 432, 444, 492, 504, 508, 1555, 1560, 1605, 1675, 1790, 5832, 5940, 5976, 6048, 6078, 6102, 6108, 6132, 6138, 21175, 21266, 21280, 21301, 21434, 21462, 21469, 21616, 21623, 21749, 21770, 21784, 81472, 81528, 81648]

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

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