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.

A086325 Let u(1)=0, u(2)=1, u(k)=u(k-1)+u(k-2)/(k-2); then a(n)=n!*u(n).

Table of values

n a(n)
1 0
2 2
3 6
4 36
5 220
6 1590
7 12978
8 118664
9 1201464
10 13349610
11 161530270
12 2114578092
13 29780308116
14 448995414686
15 7215997736010
16 123153028027920
17 2224451568754288
18 42395429898611154
19 850263899633257014
20 17900292623858042420
21 394701452356069835340
22 9096928711444657157382
23 218739785834282892557026

List of values

[0, 2, 6, 36, 220, 1590, 12978, 118664, 1201464, 13349610, 161530270, 2114578092, 29780308116, 448995414686, 7215997736010, 123153028027920, 2224451568754288, 42395429898611154, 850263899633257014, 17900292623858042420, 394701452356069835340, 9096928711444657157382, 218739785834282892557026]