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.

A180736 a(n) = [r]*[2r]*...[nr], where r=sqrt(2) and []=floor.

Table of values

n a(n)
1 1
2 2
3 8
4 40
5 280
6 2240
7 20160
8 221760
9 2661120
10 37255680
11 558835200
12 8941363200
13 160944537600
14 3057946214400
15 64216870502400
16 1412771151052800
17 33906507625267200
18 847662690631680000
19 22039229956423680000
20 617098438779863040000
21 17895854724616028160000
22 554771496463096872960000

List of values

[1, 2, 8, 40, 280, 2240, 20160, 221760, 2661120, 37255680, 558835200, 8941363200, 160944537600, 3057946214400, 64216870502400, 1412771151052800, 33906507625267200, 847662690631680000, 22039229956423680000, 617098438779863040000, 17895854724616028160000, 554771496463096872960000]