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 1-10 of 13 results. Next

A188411 Number of (4*n)X4 binary arrays with rows in nonincreasing order, n ones in every column and no more than 3 ones in any row.

Original entry on oeis.org

14, 124, 723, 3217, 11712, 36659, 101829, 256901, 598561, 1304537, 2685847, 5264872, 9887953, 17884567, 31286432, 53124506, 87823301, 141718060, 223721900, 346177936, 525932968, 785679308, 1155612796, 1675467445, 2396988410
Offset: 1

Views

Author

R. H. Hardin Mar 30 2011

Keywords

Comments

Column 4 of A188416

Examples

			Some solutions for 8X4
..1..1..0..1....1..0..0..1....1..0..0..1....1..1..1..0....1..0..1..0
..1..0..1..0....1..0..0..0....1..0..0..1....1..1..0..0....1..0..0..0
..0..1..1..1....0..1..0..0....0..1..1..0....0..0..1..0....0..1..1..1
..0..0..0..0....0..1..0..0....0..1..0..0....0..0..0..1....0..1..0..1
..0..0..0..0....0..0..1..1....0..0..1..0....0..0..0..1....0..0..0..0
..0..0..0..0....0..0..1..0....0..0..0..0....0..0..0..0....0..0..0..0
..0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0
..0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0

Links

A188412 Number of (5*n)X5 binary arrays with rows in nonincreasing order, n ones in every column and no more than 3 ones in any row.

Original entry on oeis.org

46, 1308, 21965, 252493, 2181522, 15083334, 87171345, 434626896, 1914365683, 7586544223, 27443717856, 91677539685, 285511159634, 835479072942, 2312389036003, 6087264779565, 15314086591293, 36970334246131
Offset: 1

Views

Author

R. H. Hardin Mar 30 2011

Keywords

Comments

Column 5 of A188416

Examples

			Some solutions for 10X5
..1..1..0..0..0....1..0..0..0..0....1..1..0..0..0....1..0..1..0..0
..1..0..0..0..0....1..0..0..0..0....1..0..1..1..0....1..0..0..1..1
..0..1..0..1..1....0..1..1..1..0....0..1..0..0..0....0..1..0..0..0
..0..0..1..0..0....0..1..1..1..0....0..0..1..0..1....0..1..0..0..0
..0..0..1..0..0....0..0..0..0..1....0..0..0..1..0....0..0..1..0..0
..0..0..0..1..1....0..0..0..0..1....0..0..0..0..1....0..0..0..1..0
..0..0..0..0..0....0..0..0..0..0....0..0..0..0..0....0..0..0..0..1
..0..0..0..0..0....0..0..0..0..0....0..0..0..0..0....0..0..0..0..0
..0..0..0..0..0....0..0..0..0..0....0..0..0..0..0....0..0..0..0..0
..0..0..0..0..0....0..0..0..0..0....0..0..0..0..0....0..0..0..0..0

Links

A188410 Number of (n^2)Xn binary arrays with rows in nonincreasing order, n ones in every column and no more than 3 ones in any row.

Original entry on oeis.org

1, 3, 39, 3217, 2181522, 14100262412, 990154499577167
Offset: 1

Views

Author

R. H. Hardin Mar 30 2011

Keywords

Comments

Diagonal of A188416

Examples

			All solutions for 4X2
..1..1....1..1....1..0
..1..0....1..1....1..0
..0..1....0..0....0..1
..0..0....0..0....0..1

A188413 Number of (6*n) X 6 binary arrays with rows in nonincreasing order, n ones in every column and no more than 3 ones in any row.

Original entry on oeis.org

166, 17443, 968230, 33313408, 793369090, 14100262412, 197263686098, 2259540285524, 21835069296894, 182229535192536
Offset: 1

Views

Author

R. H. Hardin, Mar 30 2011

Keywords

Comments

Column 6 of A188416.

Examples

			Some solutions for 12 X 6
..1..1..0..0..0..0....1..0..0..0..0..0....1..1..0..0..0..0....1..0..0..0..0..0
..1..0..0..1..1..0....1..0..0..0..0..0....1..0..0..0..0..0....1..0..0..0..0..0
..0..1..1..0..0..0....0..1..1..0..1..0....0..1..0..1..0..1....0..1..0..0..0..1
..0..0..1..0..0..0....0..1..0..1..0..1....0..0..1..0..1..1....0..1..0..0..0..0
..0..0..0..1..0..1....0..0..1..0..1..0....0..0..1..0..1..0....0..0..1..1..0..0
..0..0..0..0..1..0....0..0..0..1..0..0....0..0..0..1..0..0....0..0..1..0..1..0
..0..0..0..0..0..1....0..0..0..0..0..1....0..0..0..0..0..0....0..0..0..1..0..1
..0..0..0..0..0..0....0..0..0..0..0..0....0..0..0..0..0..0....0..0..0..0..1..0
..0..0..0..0..0..0....0..0..0..0..0..0....0..0..0..0..0..0....0..0..0..0..0..0
..0..0..0..0..0..0....0..0..0..0..0..0....0..0..0..0..0..0....0..0..0..0..0..0
..0..0..0..0..0..0....0..0..0..0..0..0....0..0..0..0..0..0....0..0..0..0..0..0
..0..0..0..0..0..0....0..0..0..0..0..0....0..0..0..0..0..0....0..0..0..0..0..0

Crossrefs

Cf. A188416.

A188414 Number of (7*n)X7 binary arrays with rows in nonincreasing order, n ones in every column and no more than 3 ones in any row.

Original entry on oeis.org

652, 282349, 57967660, 6720357785, 498407294632, 25784105550034, 990154499577167
Offset: 1

Views

Author

R. H. Hardin Mar 30 2011

Keywords

Comments

Column 7 of A188416

Examples

			Some solutions for 14X7
..1..0..0..0..0..1..1....1..0..0..0..0..1..0....1..0..0..1..0..0..1
..1..0..0..0..0..0..0....1..0..0..0..0..0..0....1..0..0..0..0..0..1
..0..1..0..1..0..0..0....0..1..0..1..1..0..0....0..1..0..1..1..0..0
..0..1..0..0..0..1..0....0..1..0..0..0..0..1....0..1..0..0..0..0..0
..0..0..1..0..0..0..0....0..0..1..1..0..0..0....0..0..1..0..1..0..0
..0..0..1..0..0..0..0....0..0..1..0..0..0..1....0..0..1..0..0..1..0
..0..0..0..1..1..0..0....0..0..0..0..1..0..0....0..0..0..0..0..1..0
..0..0..0..0..1..0..0....0..0..0..0..0..1..0....0..0..0..0..0..0..0
..0..0..0..0..0..0..1....0..0..0..0..0..0..0....0..0..0..0..0..0..0
..0..0..0..0..0..0..0....0..0..0..0..0..0..0....0..0..0..0..0..0..0
..0..0..0..0..0..0..0....0..0..0..0..0..0..0....0..0..0..0..0..0..0
..0..0..0..0..0..0..0....0..0..0..0..0..0..0....0..0..0..0..0..0..0
..0..0..0..0..0..0..0....0..0..0..0..0..0..0....0..0..0..0..0..0..0
..0..0..0..0..0..0..0....0..0..0..0..0..0..0....0..0..0..0..0..0..0

A188415 Number of (8*n)X8 binary arrays with rows in nonincreasing order, n ones in every column and no more than 3 ones in any row.

Original entry on oeis.org

2780, 5396178, 4505774905, 1943505834628, 497114063711190
Offset: 1

Views

Author

R. H. Hardin Mar 30 2011

Keywords

Comments

Column 8 of A188416

Examples

			Some solutions for 16X8
..1..0..0..0..0..0..0..1....1..0..0..0..0..0..1..1....1..0..0..0..0..0..1..0
..1..0..0..0..0..0..0..0....1..0..0..0..0..0..0..0....1..0..0..0..0..0..0..0
..0..1..0..0..0..0..0..0....0..1..0..0..0..0..1..0....0..1..0..0..0..1..0..0
..0..1..0..0..0..0..0..0....0..1..0..0..0..0..0..1....0..1..0..0..0..0..0..0
..0..0..1..0..1..0..1..0....0..0..1..0..0..1..0..0....0..0..1..0..1..0..1..0
..0..0..1..0..0..0..0..0....0..0..1..0..0..0..0..0....0..0..1..0..0..0..0..1
..0..0..0..1..0..1..0..0....0..0..0..1..1..0..0..0....0..0..0..1..0..0..0..1
..0..0..0..1..0..0..0..0....0..0..0..1..1..0..0..0....0..0..0..1..0..0..0..0
..0..0..0..0..1..0..1..0....0..0..0..0..0..1..0..0....0..0..0..0..1..1..0..0
..0..0..0..0..0..1..0..0....0..0..0..0..0..0..0..0....0..0..0..0..0..0..0..0
..0..0..0..0..0..0..0..1....0..0..0..0..0..0..0..0....0..0..0..0..0..0..0..0
..0..0..0..0..0..0..0..0....0..0..0..0..0..0..0..0....0..0..0..0..0..0..0..0
..0..0..0..0..0..0..0..0....0..0..0..0..0..0..0..0....0..0..0..0..0..0..0..0
..0..0..0..0..0..0..0..0....0..0..0..0..0..0..0..0....0..0..0..0..0..0..0..0
..0..0..0..0..0..0..0..0....0..0..0..0..0..0..0..0....0..0..0..0..0..0..0..0
..0..0..0..0..0..0..0..0....0..0..0..0..0..0..0..0....0..0..0..0..0..0..0..0

A188417 Number of (2*n)Xn binary arrays with rows in nonincreasing order, 2 ones in every column and no more than 3 ones in any row.

Original entry on oeis.org

1, 3, 16, 124, 1308, 17443, 282349, 5396178, 119324602, 3005520274, 85152637884, 2685936442822, 93514176139534
Offset: 1

Views

Author

R. H. Hardin Mar 30 2011

Keywords

Comments

Row 2 of A188416

Examples

			All solutions for 4X2
..1..1....1..1....1..0
..1..0....1..1....1..0
..0..1....0..0....0..1
..0..0....0..0....0..1

A188418 Number of (3*n)Xn binary arrays with rows in nonincreasing order, 3 ones in every column and no more than 3 ones in any row.

Original entry on oeis.org

1, 4, 39, 723, 21965, 968230, 57967660, 4505774905, 439923593145, 52601045792520
Offset: 1

Views

Author

R. H. Hardin Mar 30 2011

Keywords

Comments

Row 3 of A188416

Examples

			All solutions for 6X2
..1..0....1..1....1..1....1..1
..1..0....1..1....1..0....1..1
..1..0....1..0....1..0....1..1
..0..1....0..1....0..1....0..0
..0..1....0..0....0..1....0..0
..0..1....0..0....0..0....0..0

A188419 Number of (4*n) X n binary arrays with rows in nonincreasing order, four 1's in every column and no more than three 1's in any row.

Original entry on oeis.org

1, 5, 81, 3217, 252493, 33313408, 6720357785, 1943505834628, 768799728447441
Offset: 1

Views

Author

R. H. Hardin, Mar 30 2011

Keywords

Comments

Row 4 of A188416.

Examples

			All solutions for 8 X 2
..1..0....1..1....1..1....1..1....1..1
..1..0....1..1....1..1....1..0....1..1
..1..0....1..1....1..1....1..0....1..0
..1..0....1..1....1..0....1..0....1..0
..0..1....0..0....0..1....0..1....0..1
..0..1....0..0....0..0....0..1....0..1
..0..1....0..0....0..0....0..1....0..0
..0..1....0..0....0..0....0..0....0..0

Crossrefs

Cf. A188416.

A188420 Number of (5*n)Xn binary arrays with rows in nonincreasing order, 5 ones in every column and no more than 3 ones in any row.

Original entry on oeis.org

1, 6, 150, 11712, 2181522, 793369090, 498407294632, 497114063711190
Offset: 1

Views

Author

R. H. Hardin Mar 30 2011

Keywords

Comments

Row 5 of A188416

Examples

			All solutions for 10X2
..1..1....1..1....1..0....1..1....1..1....1..1
..1..1....1..1....1..0....1..0....1..1....1..1
..1..1....1..0....1..0....1..0....1..1....1..1
..1..0....1..0....1..0....1..0....1..1....1..1
..1..0....1..0....1..0....1..0....1..1....1..0
..0..1....0..1....0..1....0..1....0..0....0..1
..0..1....0..1....0..1....0..1....0..0....0..0
..0..0....0..1....0..1....0..1....0..0....0..0
..0..0....0..0....0..1....0..1....0..0....0..0
..0..0....0..0....0..1....0..0....0..0....0..0
Showing 1-10 of 13 results. Next

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