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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.

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A221261 Number of 7Xn arrays of occupancy after each element moves to some horizontal or antidiagonal neighbor, with no occupancy greater than 2.

Original entry on oeis.org

0, 4096, 5822, 1250753956, 278802326676, 1080371161000000, 720107530988047980, 1273696206975009956961, 1220346471047321694829098
Offset: 1

Views

Author

R. H. Hardin Jan 06 2013

Keywords

Comments

Row 7 of A221255

Examples

			Some solutions for n=3
..1..2..0....0..2..2....0..2..0....1..2..0....1..2..0....0..2..0....1..2..0
..1..2..0....0..2..0....1..2..0....0..2..0....0..2..1....1..2..0....0..2..0
..0..2..2....0..2..1....2..2..0....1..2..1....0..2..1....1..2..1....1..2..1
..0..2..0....0..2..0....0..2..0....0..2..0....0..2..0....1..2..1....0..2..0
..0..2..1....2..2..0....1..2..1....2..2..0....1..2..2....0..2..1....1..2..0
..0..2..2....0..2..1....1..2..1....0..2..1....0..2..1....0..2..0....1..2..1
..0..2..0....0..2..1....0..2..0....0..2..1....0..2..0....1..2..0....1..2..0
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