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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.

A203766 Vandermonde sequence using x^2 + y^2 applied to (1,1,2,2,...,floor(n/2)).

Table of values

n a(n)
1 1
2 2
3 50
4 10000
5 169000000
6 51409800000000
7 3714358050000000000000
8 8587595811600000000000000000000
9 9487238856297219731001600000000000000000000
10 524056459404241401975165324773422080000000000000000000000

List of values

[1, 2, 50, 10000, 169000000, 51409800000000, 3714358050000000000000, 8587595811600000000000000000000, 9487238856297219731001600000000000000000000, 524056459404241401975165324773422080000000000000000000000]

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

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