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.

A301836 Number of n X 3 0..1 arrays with every element equal to 0, 1 or 2 horizontally or antidiagonally adjacent elements, with upper left element zero.

Table of values

n a(n)
1 4
2 25
3 139
4 773
5 4299
6 23909
7 132971
8 739525
9 4112907
10 22874149
11 127215787
12 707517317
13 3934894923
14 21884125925
15 121709722091
16 676895047237
17 3764587553931
18 20936952499621
19 116441967065899
20 647598149464325

List of values

[4, 25, 139, 773, 4299, 23909, 132971, 739525, 4112907, 22874149, 127215787, 707517317, 3934894923, 21884125925, 121709722091, 676895047237, 3764587553931, 20936952499621, 116441967065899, 647598149464325]

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

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