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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.

A204820 a(n) = -4*a(n-1)*A001505(n-2), with a(1)=8.

Table of values

n a(n)
1 8
2 -192
3 161280
4 -638668800
5 6974263296000
6 -162193467211776000
7 6893871130369327104000
8 -483949753351926762700800000
9 52208499391605859160162304000000
10 -8200911084433448356878294712320000000

List of values

[8, -192, 161280, -638668800, 6974263296000, -162193467211776000, 6893871130369327104000, -483949753351926762700800000, 52208499391605859160162304000000, -8200911084433448356878294712320000000]

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

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