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.

A221940 Number of 4Xn arrays of occupancy after each element stays put or moves to some horizontal or antidiagonal neighbor, without move-in move-out straight through or left turns.

Table of values

n a(n)
1 1
2 489
3 24535
4 1759041
5 119035112
6 8118923949
7 552777330287
8 37650441405451
9 2564181255574899
10 174635497977344862
11 11893675692936218866
12 810026663520753630706
13 55167419097633745309553
14 3757214394165203187203557

List of values

[1, 489, 24535, 1759041, 119035112, 8118923949, 552777330287, 37650441405451, 2564181255574899, 174635497977344862, 11893675692936218866, 810026663520753630706, 55167419097633745309553, 3757214394165203187203557]

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

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