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.

A249764 Numbers which divide the concatenation, in ascending order, of their anti-divisors.

Table of values

n a(n)
1 15
2 30
3 105
4 120
5 150
6 222
7 375
8 585
9 1500
10 1695
11 1755
12 1800
13 2700
14 3449
15 3750
16 3840
17 4891
18 6720
19 7680
20 12000
21 13583
22 14400
23 15000
24 18750
25 19200
26 20940
27 28134
28 30000
29 34800
30 35625
31 46875
32 48000
33 68400
34 72504
35 75000
36 93750
37 120000
38 128400

List of values

[15, 30, 105, 120, 150, 222, 375, 585, 1500, 1695, 1755, 1800, 2700, 3449, 3750, 3840, 4891, 6720, 7680, 12000, 13583, 14400, 15000, 18750, 19200, 20940, 28134, 30000, 34800, 35625, 46875, 48000, 68400, 72504, 75000, 93750, 120000, 128400]

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

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