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.

A120014 Coefficients of x^n in the n-th iteration of the g.f. of A120009, so that: a(n) = [x^n] { (x-x^2) o x/(1-n*x) o (1-sqrt(1-4*x))/2 } for n>=1.

Table of values

n a(n)
1 1
2 2
3 9
4 60
5 530
6 5892
7 79681
8 1276760
9 23729310
10 502780580
11 11974950746
12 316917570312
13 9230453871756
14 293492484431720
15 10117826259791025
16 375952605020796720
17 14980065429077943734
18 637215061582781559972

List of values

[1, 2, 9, 60, 530, 5892, 79681, 1276760, 23729310, 502780580, 11974950746, 316917570312, 9230453871756, 293492484431720, 10117826259791025, 375952605020796720, 14980065429077943734, 637215061582781559972]