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.

A205412 Number of (n+2)X7 0..2 arrays with every 3X3 subblock having three equal elements in a row horizontally, vertically or nw-to-se diagonally exactly two ways, and new values 0..2 introduced in row major order.

Table of values

n a(n)
1 1820215
2 64878898
3 2553087985
4 67792717447
5 2520131261396
6 98445276297551
7 3148208484619590
8 113563473572336662
9 4281011039064902788

List of values

[1820215, 64878898, 2553087985, 67792717447, 2520131261396, 98445276297551, 3148208484619590, 113563473572336662, 4281011039064902788]

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

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