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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.

A049209 a(n) = -Product_{k=0..n} (7*k-1); sept-factorial numbers.

Table of values

n a(n)
0 1
1 6
2 78
3 1560
4 42120
5 1432080
6 58715280
7 2818333440
8 155008339200
9 9610517030400
10 663125675097600
11 50397551307417600
12 4182996758515660800
13 376469708266409472000
14 36517561701841718784000
15 3797826416991538753536000
16 421558732286060801642496000

List of values

[1, 6, 78, 1560, 42120, 1432080, 58715280, 2818333440, 155008339200, 9610517030400, 663125675097600, 50397551307417600, 4182996758515660800, 376469708266409472000, 36517561701841718784000, 3797826416991538753536000, 421558732286060801642496000]

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

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