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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.

A376693 a(n) is the first k such that if x(1) = k and x(i+1) = A062028(x(i)), x(1) to x(n) are all semiprimes but x(n+1) is not.

Table of values

n a(n)
0 1
1 4
2 15
3 22
4 39
5 33
6 291
7 23174
8 90137
9 119135
10 1641362
11 1641337
12 7113362
13 471779113

List of values

[1, 4, 15, 22, 39, 33, 291, 23174, 90137, 119135, 1641362, 1641337, 7113362, 471779113]

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

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