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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.

A354423 a(0)=1; a(n) is the smallest positive integer that cannot be obtained from the integers {1, ..., n} using each number at most once, and the operators addition and multiplication.

Table of values

n a(n)
0 1
1 2
2 4
3 10
4 22
5 58
6 233
7 827
8 3359
9 16631
10 114371
11 708278
12 3975838
13 35724478

List of values

[1, 2, 4, 10, 22, 58, 233, 827, 3359, 16631, 114371, 708278, 3975838, 35724478]

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

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