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.

A123023 a(n) = (n-1)*a(n-2), a(0)=1, a(1)=0.

Table of values

n a(n)
0 1
1 0
2 1
3 0
4 3
5 0
6 15
7 0
8 105
9 0
10 945
11 0
12 10395
13 0
14 135135
15 0
16 2027025
17 0
18 34459425
19 0
20 654729075
21 0
22 13749310575
23 0
24 316234143225
25 0
26 7905853580625
27 0
28 213458046676875
29 0
30 6190283353629375
31 0
32 191898783962510625
33 0
34 6332659870762850625
35 0
36 221643095476699771875

List of values

[1, 0, 1, 0, 3, 0, 15, 0, 105, 0, 945, 0, 10395, 0, 135135, 0, 2027025, 0, 34459425, 0, 654729075, 0, 13749310575, 0, 316234143225, 0, 7905853580625, 0, 213458046676875, 0, 6190283353629375, 0, 191898783962510625, 0, 6332659870762850625, 0, 221643095476699771875]