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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.

A373202 Product over all sums of {n, +/-(n-1), +/-(n-2), ..., +/-1}, where "+/-" means here we use all possible combination of signs, this means for n > 0 that we have 2^(n-1) factors.

Table of values

n a(n)
0 1
1 1
2 3
3 0
4 0
5 -28733079375
6 -821329806742140930609375
7 0
8 0

List of values

[1, 1, 3, 0, 0, -28733079375, -821329806742140930609375, 0, 0]

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

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