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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.

A242981 Carmichael numbers of the form (6*k + 1)*(12*k + 1)*(18*k + 1), where only one of the three numbers 6*k + 1, 12*k + 1, 18*k + 1 is prime.

Table of values

n a(n)
1 13992265
2 1504651681
3 14782305601
4 292869912385
5 2387706608354185
6 4484354372982001
7 70895950685971489
8 807481759780458361
9 1659264916949696161
10 118023300545190612481
11 140695625117781970705
12 11710597360056333492601
13 19818019625768288167321

List of values

[13992265, 1504651681, 14782305601, 292869912385, 2387706608354185, 4484354372982001, 70895950685971489, 807481759780458361, 1659264916949696161, 118023300545190612481, 140695625117781970705, 11710597360056333492601, 19818019625768288167321]

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

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