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.

A240586 Expansion of (((8-8 / sqrt(1-8*x)) / (2*sqrt(8*x+2*sqrt(1-8*x)+2))+4 / sqrt(1-8*x))*((x*(sqrt(8*x+2*sqrt(1-8*x)+2)-sqrt(1-8*x)-1))-4*x^2)) / (sqrt(8*x+2*sqrt(1-8*x)+2)-sqrt(1-8*x)-1)^2.

Table of values

n a(n)
1 1
2 4
3 22
4 140
5 950
6 6692
7 48284
8 354216
9 2630310
10 19713188
11 148817524
12 1130011896
13 8621650492
14 66043991080
15 507628779896
16 3913088587472
17 30240258982662
18 234210742764964
19 1817484391184900
20 14128074297880536
21 109992814064010196
22 857525947713607096
23 6693820044841440008

List of values

[1, 4, 22, 140, 950, 6692, 48284, 354216, 2630310, 19713188, 148817524, 1130011896, 8621650492, 66043991080, 507628779896, 3913088587472, 30240258982662, 234210742764964, 1817484391184900, 14128074297880536, 109992814064010196, 857525947713607096, 6693820044841440008]