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.

A113841 a(n) = a(n-1) + 2^A047240(n) for n>1, a(1)=1.

Table of values

n a(n)
1 1
2 3
3 7
4 71
5 199
6 455
7 4551
8 12743
9 29127
10 291271
11 815559
12 1864135
13 18641351
14 52195783
15 119304647
16 1193046471
17 3340530119
18 7635497415
19 76354974151
20 213793927623
21 488671834567
22 4886718345671
23 13682811367879
24 31274997412295

List of values

[1, 3, 7, 71, 199, 455, 4551, 12743, 29127, 291271, 815559, 1864135, 18641351, 52195783, 119304647, 1193046471, 3340530119, 7635497415, 76354974151, 213793927623, 488671834567, 4886718345671, 13682811367879, 31274997412295]