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.

A111394 a(n) = product of first n integers not divisible by 3.

Table of values

n a(n)
1 1
2 2
3 8
4 40
5 280
6 2240
7 22400
8 246400
9 3203200
10 44844800
11 717516800
12 12197785600
13 231757926400
14 4635158528000
15 101973487616000
16 2345390215168000
17 58634755379200000
18 1524503639859200000
19 42686101916057600000
20 1237896955565670400000
21 38374805622535782400000

List of values

[1, 2, 8, 40, 280, 2240, 22400, 246400, 3203200, 44844800, 717516800, 12197785600, 231757926400, 4635158528000, 101973487616000, 2345390215168000, 58634755379200000, 1524503639859200000, 42686101916057600000, 1237896955565670400000, 38374805622535782400000]

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

Content is available under The OEIS End-User License Agreement.