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.

A109621 Numbers n such that the numerator of Sum_{k=0..n} 1/k!, in reduced form, is prime.

Table of values

n a(n)
1 1
2 2
3 5
4 9
5 24
6 32
7 321
8 343
9 352
10 511
11 685
12 807
13 966
14 1079
15 1274
16 1381
17 2016
18 3226
19 8130

List of values

[1, 2, 5, 9, 24, 32, 321, 343, 352, 511, 685, 807, 966, 1079, 1274, 1381, 2016, 3226, 8130]