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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.

A354211 a(n) is the numerator of Sum_{k=0..n} 1 / (2*k+1)!.

Table of values

n a(n)
0 1
1 7
2 47
3 5923
4 426457
5 15636757
6 7318002277
7 1536780478171
8 603180793741
9 142957467201379447
10 60042136224579367741
11 10127106976545720025649
12 18228792557782296046168201
13 12796612375563171824410077103
14 3463616416319098507140327535879
15 1380498543075754976417359117871773

List of values

[1, 7, 47, 5923, 426457, 15636757, 7318002277, 1536780478171, 603180793741, 142957467201379447, 60042136224579367741, 10127106976545720025649, 18228792557782296046168201, 12796612375563171824410077103, 3463616416319098507140327535879, 1380498543075754976417359117871773]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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