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.

A200797 Number of nX4 0..3 arrays with values 0..3 introduced in row major order and each element equal to no more than two horizontal and vertical neighbors.

Table of values

n a(n)
1 15
2 2614
3 583813
4 132636590
5 30147154218
6 6852264918471
7 1557479347400065
8 354005859128023982
9 80463441477635545163
10 18288865135614195620421
11 4156951055108642793860100
12 944850429287655687332694651

List of values

[15, 2614, 583813, 132636590, 30147154218, 6852264918471, 1557479347400065, 354005859128023982, 80463441477635545163, 18288865135614195620421, 4156951055108642793860100, 944850429287655687332694651]

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

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