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.

A080355 a(1)=1; thereafter, a(n+1) = a(n) + 2^(prime(n)-1).

Table of values

n a(n)
1 1
2 3
3 7
4 23
5 87
6 1111
7 5207
8 70743
9 332887
10 4527191
11 272962647
12 1346704471
13 70066181207
14 1169577808983
15 5567624320087
16 75936368497751
17 4579535995868247
18 292809912147579991
19 1445731416754426967
20 75232707711592633431
21 1255824328429003936855
22 5978190811298649150551

List of values

[1, 3, 7, 23, 87, 1111, 5207, 70743, 332887, 4527191, 272962647, 1346704471, 70066181207, 1169577808983, 5567624320087, 75936368497751, 4579535995868247, 292809912147579991, 1445731416754426967, 75232707711592633431, 1255824328429003936855, 5978190811298649150551]