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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.

A203673 Vandermonde sequence using x^2 + xy + y^2 applied to (1,4,9,...,n^2).

Table of values

n a(n)
1 1
2 21
3 254163
4 11213968422384
5 6451450005117349260375984
6 127857993263632065817610313129228311433216
7 191199773886534869435599958788731398661833328276349525268803584

List of values

[1, 21, 254163, 11213968422384, 6451450005117349260375984, 127857993263632065817610313129228311433216, 191199773886534869435599958788731398661833328276349525268803584]

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

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