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.

A300989 O.g.f. A(x) satisfies: A(x) = x*(1 - 3*x*A'(x)) / (1 - 4*x*A'(x)).

Table of values

n a(n)
1 1
2 1
3 6
4 50
5 520
6 6312
7 86080
8 1288704
9 20862720
10 361454720
11 6652338176
12 129341001216
13 2645494627328
14 56734280221696
15 1272300911597568
16 29769957834147840
17 725430667245355008
18 18379623419316338688
19 483476314203202945024
20 13187069277429966733312
21 372512001057014648537088
22 10886129458069912361631744
23 328776894530826384975593472

List of values

[1, 1, 6, 50, 520, 6312, 86080, 1288704, 20862720, 361454720, 6652338176, 129341001216, 2645494627328, 56734280221696, 1272300911597568, 29769957834147840, 725430667245355008, 18379623419316338688, 483476314203202945024, 13187069277429966733312, 372512001057014648537088, 10886129458069912361631744, 328776894530826384975593472]