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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.

A203748 Vandermonde sequence using x^2 + xy + y^2 applied to (0,1,1,2,2,...,floor(n/2)).

Table of values

n a(n)
1 1
2 1
3 3
4 588
5 1382976
6 759365845056
7 11257740654368225472
8 85256857822344357223236943872
9 30991931452969951465382132459004342829056
10 10117962915393557751514211466029580457669394910570086400

List of values

[1, 1, 3, 588, 1382976, 759365845056, 11257740654368225472, 85256857822344357223236943872, 30991931452969951465382132459004342829056, 10117962915393557751514211466029580457669394910570086400]

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

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