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.

A381120 Numbers k such that both A381019(k) and A381019(k+1) are composite.

Table of values

n a(n)
1 63
2 630
3 2423
4 5653
5 9104
6 26308
7 36108
8 41622
9 64526
10 85121
11 108917
12 143913
13 148305
14 176405
15 316974
16 399168
17 399907
18 406487
19 536926
20 621016
21 830793
22 937038
23 937109
24 970243
25 1088629
26 1480545
27 1895503
28 3961587
29 4651102
30 5171081
31 5487450
32 6219705
33 7327856
34 8118740

List of values

[63, 630, 2423, 5653, 9104, 26308, 36108, 41622, 64526, 85121, 108917, 143913, 148305, 176405, 316974, 399168, 399907, 406487, 536926, 621016, 830793, 937038, 937109, 970243, 1088629, 1480545, 1895503, 3961587, 4651102, 5171081, 5487450, 6219705, 7327856, 8118740]

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

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