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.

A208468 Number of 3Xn nonnegative integer arrays with new values 0 upwards introduced in row major order and no element equal to more than two of its immediate leftward or upward or right-upward antidiagonal neighbors.

Table of values

n a(n)
1 5
2 203
3 20746
4 4132120
5 1358524513
6 671329819215
7 468215145028629
8 440379520700561467
9 539586833002472556426
10 838156377510207185078132
11 1614568986664304552415637091
12 3787532565162728522045725351515

List of values

[5, 203, 20746, 4132120, 1358524513, 671329819215, 468215145028629, 440379520700561467, 539586833002472556426, 838156377510207185078132, 1614568986664304552415637091, 3787532565162728522045725351515]

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

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