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.

A308392 Expansion of e.g.f. exp(x + 2 * Sum_{k>=1} x^(2^k)/2^k).

Table of values

n a(n)
0 1
1 1
2 3
3 7
4 37
5 141
6 871
7 4243
8 42057
9 285337
10 3008971
11 23292831
12 295839853
13 2733811237
14 35818366767
15 360892885291
16 8394097115281
17 113063153955633
18 2347668770502547
19 32362689647446327
20 744513384520939701
21 11439249110436735421
22 245772094687992577783
23 3860080495614830875587

List of values

[1, 1, 3, 7, 37, 141, 871, 4243, 42057, 285337, 3008971, 23292831, 295839853, 2733811237, 35818366767, 360892885291, 8394097115281, 113063153955633, 2347668770502547, 32362689647446327, 744513384520939701, 11439249110436735421, 245772094687992577783, 3860080495614830875587]