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.

A303085 Number of 3Xn 0..1 arrays with every element equal to 0, 2, 3, 4 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

Table of values

n a(n)
1 4
2 2
3 32
4 29
5 258
6 432
7 2525
8 6313
9 30188
10 97855
11 428478
12 1605301
13 6821375
14 27390903
15 115569231
16 478335810
17 2017576268
18 8457463080
19 35707225807
20 150472100292
21 635822248364
22 2685274511197
23 11352580693193
24 47989709554314

List of values

[4, 2, 32, 29, 258, 432, 2525, 6313, 30188, 97855, 428478, 1605301, 6821375, 27390903, 115569231, 478335810, 2017576268, 8457463080, 35707225807, 150472100292, 635822248364, 2685274511197, 11352580693193, 47989709554314]

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

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