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.

A053983 a(n) = (2*n-1)*a(n-1) - a(n-2), a(0)=a(1)=1.

Table of values

n a(n)
0 1
1 1
2 2
3 9
4 61
5 540
6 5879
7 75887
8 1132426
9 19175355
10 363199319
11 7608010344
12 174621038593
13 4357917954481
14 117489163732394
15 3402827830284945
16 105370173575100901
17 3473812900148044788
18 121478081331606466679
19 4491215196369291222335
20 175035914577070751204386

List of values

[1, 1, 2, 9, 61, 540, 5879, 75887, 1132426, 19175355, 363199319, 7608010344, 174621038593, 4357917954481, 117489163732394, 3402827830284945, 105370173575100901, 3473812900148044788, 121478081331606466679, 4491215196369291222335, 175035914577070751204386]