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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.

A350670 Denominators of Sum_{j=0..n} 1/(2*j+1), for n >= 0.

Table of values

n a(n)
0 1
1 3
2 15
3 105
4 315
5 3465
6 45045
7 45045
8 765765
9 14549535
10 14549535
11 334639305
12 1673196525
13 5019589575
14 145568097675
15 4512611027925
16 4512611027925
17 4512611027925
18 166966608033225
19 166966608033225
20 6845630929362225
21 294362129962575675
22 294362129962575675
23 13835020108241056725
24 96845140757687397075
25 96845140757687397075
26 5132792460157432044975

List of values

[1, 3, 15, 105, 315, 3465, 45045, 45045, 765765, 14549535, 14549535, 334639305, 1673196525, 5019589575, 145568097675, 4512611027925, 4512611027925, 4512611027925, 166966608033225, 166966608033225, 6845630929362225, 294362129962575675, 294362129962575675, 13835020108241056725, 96845140757687397075, 96845140757687397075, 5132792460157432044975]

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