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.

A203972 Number of nX5 0..2 arrays with every 1 immediately preceded by 0 to the left or above, and every 2 immediately preceded by 0 1 to the left or above.

Table of values

n a(n)
1 13
2 396
3 16723
4 601521
5 22100882
6 817293052
7 30104480870
8 1109867821460
9 40918040450898
10 1508399380147856
11 55608018263653107
12 2050003686321969840
13 75573742529524147667
14 2786045396078461420336
15 102708210001323641444431

List of values

[13, 396, 16723, 601521, 22100882, 817293052, 30104480870, 1109867821460, 40918040450898, 1508399380147856, 55608018263653107, 2050003686321969840, 75573742529524147667, 2786045396078461420336, 102708210001323641444431]

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

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