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 1-6 of 6 results.

A278728 Number of n X 2 0..3 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly one mistake.

Original entry on oeis.org

6, 152, 1947, 17352, 121520, 712406, 3633649, 16547278, 68531079, 261693631, 931194981, 3113638802, 9849622993, 29642927267, 85271613063, 235393492799, 625708778733, 1606286648601, 3992748071821, 9631887926896, 22595573914587
Offset: 1

Views

Author

R. H. Hardin, Nov 27 2016

Keywords

Comments

Column 2 of A278734.

Examples

			Some solutions for n=4
..2..2. .1..1. .2..1. .1..1. .2..0. .1..0. .3..0. .0..0. .1..1. .2..2
..3..0. .1..1. .2..2. .3..2. .3..2. .3..2. .3..0. .3..1. .2..1. .3..0
..0..2. .0..0. .1..0. .2..2. .0..0. .0..0. .3..0. .1..0. .2..2. .2..3
..0..2. .1..1. .1..0. .2..3. .2..0. .0..1. .2..1. .1..0. .1..0. .3..2
		

Crossrefs

Cf. A278734.

Formula

Empirical polynomial of degree 28 (see link above).

A278729 Number of nX3 0..3 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly one mistake.

Original entry on oeis.org

40, 1947, 58904, 1410818, 28637916, 506031118, 7907770636, 110655824716, 1401584381570, 16222274394016, 173007912264684, 1712497545142699, 15831976807688826, 137451501603516285, 1125976516897709842
Offset: 1

Views

Author

R. H. Hardin, Nov 27 2016

Keywords

Comments

Column 3 of A278734.

Examples

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

Crossrefs

Cf. A278734.

Formula

Empirical polynomial of degree 109 (see link above)

A278730 Number of nX4 0..3 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly one mistake.

Original entry on oeis.org

155, 17352, 1410818, 99992428, 6410559865, 374757577056, 19983433877142, 971720519011047, 43159978267689118, 1757375854436887414, 65916636060336105608, 2289699277183162173304, 74046423246945148450929
Offset: 1

Views

Author

R. H. Hardin, Nov 27 2016

Keywords

Comments

Column 4 of A278734.

Examples

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

Crossrefs

Cf. A278734.

A278731 Number of nX5 0..3 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly one mistake.

Original entry on oeis.org

456, 121520, 28637916, 6410559865, 1351385130108, 268284486351027, 50067074390669892, 8732216738504713198, 1415177080112634284232, 212485358907612452321760, 29562031801069787043980684
Offset: 1

Views

Author

R. H. Hardin, Nov 27 2016

Keywords

Comments

Column 5 of A278734.

Examples

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

Crossrefs

Cf. A278734.

A278732 Number of n X 6 0..3 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly one mistake.

Original entry on oeis.org

1128, 712406, 506031118, 374757577056, 268284486351027, 183338866913973336, 119979123054325787300, 75059724220196821830976, 44560888984275849849896791, 24904255595102014593384961783
Offset: 1

Views

Author

R. H. Hardin, Nov 27 2016

Keywords

Comments

Column 6 of A278734.

Examples

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

Crossrefs

Cf. A278734.

A278733 Number of n X 7 0..3 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly one mistake.

Original entry on oeis.org

2472, 3633649, 7907770636, 19983433877142, 50067074390669892, 119979123054325787300, 276347089984710259199248, 616342267580395469193910007
Offset: 1

Views

Author

R. H. Hardin, Nov 27 2016

Keywords

Comments

Column 7 of A278734.

Examples

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

Crossrefs

Cf. A278734.
Showing 1-6 of 6 results.