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.

A082292 a(n) = (2n+1) * (2n)! / sqrt(4*(n+1)*Product_{k=1..2n+1} lcm(k, 2n+2-k)).

Table of values

n a(n)
2 1
3 1
4 2
5 12
6 4
7 8
8 72
9 160
10 16
11 3456
12 32
13 1792
14 129600
15 1024
16 128
17 1492992
18 256
19 2048000
20 18289152
21 180224
22 1024
23 573308928
24 1280000
25 1703936
26 241864704
27 719323136
28 8192
29 64497254400000
30 16384
31 33554432
32 234125033472
33 142606336

List of values

[1, 1, 2, 12, 4, 8, 72, 160, 16, 3456, 32, 1792, 129600, 1024, 128, 1492992, 256, 2048000, 18289152, 180224, 1024, 573308928, 1280000, 1703936, 241864704, 719323136, 8192, 64497254400000, 16384, 33554432, 234125033472, 142606336]