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.

A384832 G.f. A(x) = Sum_{n>=0} x^n * Product_{k=0..n} ((1+x)^(n-k+1) - x^k).

Table of values

n a(n)
1 1
2 2
3 4
4 13
5 41
6 144
7 533
8 2072
9 8463
10 36142
11 160852
12 744491
13 3576342
14 17796825
15 91587499
16 486686277
17 2666612930
18 15045088274
19 87301643726
20 520416443472
21 3183640482658
22 19967208261651
23 128273336978302
24 843360769602607
25 5670286993205471
26 38957428760628861
27 273318099568893757
28 1956848333035887861

List of values

[1, 2, 4, 13, 41, 144, 533, 2072, 8463, 36142, 160852, 744491, 3576342, 17796825, 91587499, 486686277, 2666612930, 15045088274, 87301643726, 520416443472, 3183640482658, 19967208261651, 128273336978302, 843360769602607, 5670286993205471, 38957428760628861, 273318099568893757, 1956848333035887861]