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.

A124384 O.g.f.: A(x) = Sum_{n>=0} x^n*Product_{k=0..n} (1 + 2^k*x).

Table of values

n a(n)
0 1
1 2
2 4
3 10
4 30
5 110
6 494
7 2734
8 18734
9 159278
10 1685550
11 22268974
12 367653934
13 7597868078
14 196929315886
15 6402998805550
16 261393582040110
17 13416320169124910
18 865576139256079406
19 70227589169019724846
20 7172766017169503134766
21 921829147482582383174702

List of values

[1, 2, 4, 10, 30, 110, 494, 2734, 18734, 159278, 1685550, 22268974, 367653934, 7597868078, 196929315886, 6402998805550, 261393582040110, 13416320169124910, 865576139256079406, 70227589169019724846, 7172766017169503134766, 921829147482582383174702]