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.

A209013 Number of n X 2 0..3 arrays with no element equal the average of immediate neighbors vertically above, diagonally above and left, and horizontally left of it.

Table of values

n a(n)
1 12
2 130
3 1430
4 15724
5 172936
6 1901964
7 20918008
8 230058424
9 2530206824
10 27827480224
11 306049553920
12 3365965156848
13 37019238613696
14 407141477256160
15 4477784761704800
16 49247147465796160
17 541625304181537792

List of values

[12, 130, 1430, 15724, 172936, 1901964, 20918008, 230058424, 2530206824, 27827480224, 306049553920, 3365965156848, 37019238613696, 407141477256160, 4477784761704800, 49247147465796160, 541625304181537792]

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

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