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.

Showing 1-5 of 5 results.

A221433 Number of nX3 1..(max n,3) arrays with each row and column having unrepeated values.

Original entry on oeis.org

6, 12, 12, 576, 66240, 15321600, 5411750400, 2834466324480, 2102110586634240, 2130686007341875200, 2866934087721639936000, 4998512704699099643904000, 11064050379110706817558118400, 30552674703715743883429360435200
Offset: 1

Views

Author

R. H. Hardin Jan 16 2013

Keywords

Comments

Column 3 of A221438.

Examples

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

References

  • RJ Stones, S Lin, X Liu, G Wang, On Computing the Number of Latin Rectangles, Graphs and Combinatorics, Graphs and Combinatorics (2016) 32:1187-1202; DOI 10.1007/s00373-015-1643-1

Crossrefs

Cf. A221438.

A221434 Number of n X 4 1..(max n,4) arrays with each row and column having unrepeated values.

Original entry on oeis.org

24, 216, 576, 576, 161280, 283046400, 782137036800, 3563924952268800, 25315180943034286080, 269169718618593283276800, 4137679434467601752260608000, 89264433387042486497787641856000, 2634485866147603716480364478201856000, 104038940808800435615474810743389211852800
Offset: 1

Views

Author

R. H. Hardin, Jan 16 2013

Keywords

Examples

			Some solutions for n=3:
..2..4..1..3....4..2..3..1....1..3..2..4....4..1..2..3....2..1..3..4
..3..1..4..2....3..1..4..2....2..4..1..3....1..2..3..4....4..3..2..1
..4..2..3..1....1..4..2..3....4..2..3..1....3..4..1..2....3..4..1..2
		

Crossrefs

Column 4 of A221438.

A221435 Number of nX5 1..(max n,5) arrays with each row and column having unrepeated values.

Original entry on oeis.org

120, 5280, 66240, 161280, 161280, 812851200, 20449013760000, 921456860096102400, 68695056598964266598400
Offset: 1

Views

Author

R. H. Hardin Jan 16 2013

Keywords

Comments

Column 5 of A221438

Examples

			Some solutions for n=3
..3..5..2..1..4....1..4..2..5..3....1..3..4..2..5....5..4..1..2..3
..1..3..5..4..2....2..3..4..1..5....2..4..1..5..3....2..1..5..3..4
..2..1..4..5..3....4..5..3..2..1....3..5..2..1..4....4..3..2..5..1
		

A221436 Number of nX6 1..(max n,6) arrays with each row and column having unrepeated values.

Original entry on oeis.org

720, 190800, 15321600, 283046400, 812851200, 812851200, 61479419904000
Offset: 1

Views

Author

R. H. Hardin Jan 16 2013

Keywords

Comments

Column 6 of A221438

Examples

			Some solutions for n=3
..1..6..2..3..5..4....1..3..2..5..4..6....1..3..2..6..4..5....1..4..2..5..3..6
..4..3..1..6..2..5....2..1..4..6..5..3....2..1..5..4..3..6....6..3..5..2..1..4
..6..2..4..5..3..1....6..5..1..3..2..4....5..6..4..3..1..2....2..6..4..1..5..3
		

A221437 Number of nX7 1..(max n,7) arrays with each row and column having unrepeated values.

Original entry on oeis.org

5040, 9344160, 5411750400, 782137036800, 20449013760000, 61479419904000, 61479419904000
Offset: 1

Views

Author

R. H. Hardin Jan 16 2013

Keywords

Comments

Column 7 of A221438

Examples

			Some solutions for n=2
..1..2..3..4..5..6..7....1..3..5..2..6..4..7....1..2..3..4..7..6..5
..2..7..1..3..6..4..5....2..5..6..4..3..7..1....2..4..6..1..5..3..7
		
Showing 1-5 of 5 results.