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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.

A358987 Omit the trailing 5 from double factorial of odd numbers (A001147(n)).

Table of values

n a(n)
0 1
1 1
2 3
3 1
4 10
5 94
6 1039
7 13513
8 202702
9 3445942
10 65472907
11 1374931057
12 31623414322
13 790585358062
14 21345804667687
15 619028335362937
16 19189878396251062
17 633265987076285062
18 22164309547669977187
19 820079453263789155937
20 31983098677287777081562
21 1311307045768798860344062

List of values

[1, 1, 3, 1, 10, 94, 1039, 13513, 202702, 3445942, 65472907, 1374931057, 31623414322, 790585358062, 21345804667687, 619028335362937, 19189878396251062, 633265987076285062, 22164309547669977187, 820079453263789155937, 31983098677287777081562, 1311307045768798860344062]

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

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