cp's OEIS Frontend

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.

A267643 Number of nX7 0..1 arrays with every repeated value in every row and column unequal to the previous repeated value, and new values introduced in row-major sequential order.

Table of values

n a(n)
1 15
2 450
3 2829
4 32303
5 128441
6 1117207
7 3696933
8 30649693
9 90914453
10 784186403
11 2141552549
12 19980003873
13 50876741513
14 520249434779
15 1246972578665
16 13942225071453
17 31756214522413
18 383944691019691
19 839150694697605

List of values

[15, 450, 2829, 32303, 128441, 1117207, 3696933, 30649693, 90914453, 784186403, 2141552549, 19980003873, 50876741513, 520249434779, 1246972578665, 13942225071453, 31756214522413, 383944691019691, 839150694697605]

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

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