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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.

A203589 Vandermonde sequence using x^2 + y^2 applied to (1,3,5,...,2n-1).

Table of values

n a(n)
1 1
2 10
3 8840
4 1897064000
5 192924579369600000
6 15340654595434137315840000000
7 1423341281300698059502838358528000000000000
8 215088732628531399592688671811428988579913728000000000000000

List of values

[1, 10, 8840, 1897064000, 192924579369600000, 15340654595434137315840000000, 1423341281300698059502838358528000000000000, 215088732628531399592688671811428988579913728000000000000000]

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

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