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.

A209104 Number of 5Xn 0..2 arrays with new values 0..2 introduced in row major order and no element equal to more than one of its immediate leftward or upward or right-upward antidiagonal neighbors.

Table of values

n a(n)
1 41
2 4568
3 407832
4 34538488
5 2896732704
6 242632290432
7 20321585350224
8 1702054356798544
9 142558373809744128
10 11940239726878790824
11 1000077375423933174600
12 83763383343364383999032

List of values

[41, 4568, 407832, 34538488, 2896732704, 242632290432, 20321585350224, 1702054356798544, 142558373809744128, 11940239726878790824, 1000077375423933174600, 83763383343364383999032]

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

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