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.

A180337 Numbers which cannot be expressed as a sum 1 + p1 + p1*p2 + p1*p2*p3 + ... for some collection of primes {p1, p2, p3, ...}.

Table of values

n a(n)
1 2
2 5
3 11
4 23
5 26
6 47
7 56
8 95
9 116
10 122
11 236
12 254
13 518
14 530
15 1082
16 2210

List of values

[2, 5, 11, 23, 26, 47, 56, 95, 116, 122, 236, 254, 518, 530, 1082, 2210]