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.

A223061 Number of nX7 0..3 arrays with all horizontally or vertically connected equal values in a straight line, and new values 0..3 introduced in row major order.

Table of values

n a(n)
1 715
2 3361024
3 18142309235
4 99653055754459
5 549172612438350029
6 3028264612325675509047
7 16700483735732492103987445
8 92103002955687502077421475679
9 507949261500434438520234512887781

List of values

[715, 3361024, 18142309235, 99653055754459, 549172612438350029, 3028264612325675509047, 16700483735732492103987445, 92103002955687502077421475679, 507949261500434438520234512887781]

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

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