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.

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A223605 Petersen graph (8,2) coloring a rectangular array: number of 7 X n 0..15 arrays where 0..15 label nodes of a graph with edges 0,1 0,8 8,14 8,10 1,2 1,9 9,15 9,11 2,3 2,10 10,12 3,4 3,11 11,13 4,5 4,12 12,14 5,6 5,13 13,15 6,7 6,14 7,0 7,15 and every array movement to a horizontal, diagonal or antidiagonal neighbor moves along an edge of this graph.

Original entry on oeis.org

268435456, 1180256, 236213312, 20631729648, 3355919411936, 488183756623568, 78546923445668960, 12456911118159504464, 2003721183655242155360, 321631735635728311838256, 51731199109756440589448464
Offset: 1

Views

Author

R. H. Hardin, Mar 23 2013

Keywords

Comments

Row 7 of A223599.

Examples

			Some solutions for n=3
..0..8..0....0..8..0....0..8..0....0..8..0....0..8..0....0..8..0....0..8..0
..0..8..0....0..8..0....0..8..0....0..8..0....0..8..0....0..8..0....0..8..0
..0..8..0...10..8.10....0..8..0...10..8.10....0..8..0...10..8.10...14..8..0
..0..8..0...14.12.10....0..7..0....0..8.10....0..1..0...10..2.10...14..8.10
..0..1..0...10.12.14...15..7.15...14..8.10....2..1..2...10..2..1...10.12.10
..0..7..0...10.12.10....6..7.15...14..8.10....9..1..0...10..2..3....4.12.14
..0..7.15....4.12.10....6..7.15....0..8.14....0..1..2...10..2.10...14.12.10

Links

Crossrefs

Cf. A223599.

A223593 Petersen graph (8,2) coloring a rectangular array: number of n X n 0..15 arrays where 0..15 label nodes of a graph with edges 0,1 0,8 8,14 8,10 1,2 1,9 9,15 9,11 2,3 2,10 10,12 3,4 3,11 11,13 4,5 4,12 12,14 5,6 5,13 13,15 6,7 6,14 7,0 7,15 and every array movement to a horizontal, diagonal or antidiagonal neighbor moves along an edge of this graph.

Original entry on oeis.org

16, 256, 16192, 2372080, 1807461152, 5493636282928, 78546923445668960, 4667940282157447796816, 1171803483788611809638580832, 1217728112721063886738763846458896
Offset: 1

Views

Author

R. H. Hardin Mar 23 2013

Keywords

Comments

Diagonal of A223599

Examples

			Some solutions for n=3
..4..3.11....8.10..8....1..9.11....4.12.10....4..5..6...13.15..9....2.10.12
..2..3..2...12.10.12...15..9.15....4.12.14...13..5..6...13.15.13...12.10..8
.11..3..4...12.14.12...11.13.15...10.12..4....4..5..6....9.11..9...12.10..2
Previous Showing 11-12 of 12 results.

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