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 1-8 of 8 results.

A200770 Number of nX1 0..2 arrays with every row and column running average nondecreasing rightwards and downwards, and the number of instances of each value within one of each other.

Original entry on oeis.org

3, 3, 2, 7, 9, 6, 22, 30, 20, 75, 105, 70, 266, 378, 252, 966, 1386, 924, 3564, 5148, 3432, 13299, 19305, 12870, 50050, 72930, 48620, 189618, 277134, 184756, 722228, 1058148, 705432, 2762942, 4056234, 2704156, 10608612, 15600900, 10400600, 40859500
Offset: 1

Views

Author

R. H. Hardin Nov 22 2011

Keywords

Comments

Column 1 of A200777

Examples

			All solutions for n=4
..0....0....0....0....0....0....0
..0....2....0....1....1....1....2
..1....1....2....2....2....1....1
..2....2....1....2....1....2....1
		

Crossrefs

Includes A003409((n+1)/3) and A000984(n/3)

Formula

Conjecture: (n+2)*(2270*n-4893)*a(n) +3*(1090*n^2-4919*n+1654)*a(n-1) +4686*a(n-2) +2*(-5540*n^2+7016*n+17127)*a(n-3) -6*(1090*n-2739)*(2*n-7)*a(n-4)=0. - R. J. Mathar, Nov 23 2011

A200771 Number of nX2 0..2 arrays with every row and column running average nondecreasing rightwards and downwards, and the number of instances of each value within one of each other.

Original entry on oeis.org

3, 5, 5, 20, 37, 31, 144, 273, 218, 1054, 2009, 1574, 7738, 14793, 11474, 57029, 109296, 84246, 421938, 810268, 621914, 3132630, 6025862, 4611044, 23331465, 44944997, 34314054, 174267851, 336126752, 256168546, 1304988740, 2519821169, 1917689311
Offset: 1

Views

Author

R. H. Hardin Nov 22 2011

Keywords

Comments

Column 2 of A200777

Examples

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

A200772 Number of nX3 0..2 arrays with every row and column running average nondecreasing rightwards and downwards, and the number of instances of each value within one of each other.

Original entry on oeis.org

2, 5, 13, 31, 77, 217, 553, 1438, 3849, 9634, 24872, 65658, 165619, 425229, 1108871, 2787741, 7090082, 18273124, 45935694, 116433625, 297919225, 747625324, 1886048964, 4791865798, 11998842755, 30184656867, 76352766306, 190890209361
Offset: 1

Views

Author

R. H. Hardin Nov 22 2011

Keywords

Comments

Column 3 of A200777

Examples

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

A200773 Number of nX4 0..2 arrays with every row and column running average nondecreasing rightwards and downwards, and the number of instances of each value within one of each other.

Original entry on oeis.org

7, 20, 31, 342, 1368, 1806, 18801, 66784, 80772, 855668, 3041384, 3594128, 37388832, 130414591, 152057520, 1585602417, 5503438740, 6353866245, 65731117389, 226849040721, 260912168378, 2698875915314, 9278417689608, 10609858568929
Offset: 1

Views

Author

R. H. Hardin Nov 22 2011

Keywords

Comments

Column 4 of A200777

Examples

			Some solutions for n=5
..0..0..1..1....0..0..0..1....0..0..0..1....0..0..0..1....0..0..0..0
..0..0..1..1....0..0..1..1....0..2..1..1....0..2..1..1....0..1..1..1
..0..0..2..2....0..2..1..2....0..1..2..1....0..1..1..1....0..1..1..2
..0..2..2..2....1..1..1..2....0..2..1..2....0..2..2..2....0..2..1..2
..1..1..2..2....2..2..2..2....1..2..2..2....1..2..2..2....2..2..2..2
		

A200774 Number of nX5 0..2 arrays with every row and column running average nondecreasing rightwards and downwards, and the number of instances of each value within one of each other.

Original entry on oeis.org

9, 37, 77, 1368, 7725, 13422, 194535, 980702, 1678693, 24878620, 121356170, 196370947, 2842268794, 13774086909, 22130326801, 315828107827, 1502885737864, 2383360502586, 33977970254723, 160775285120155, 252353156923816
Offset: 1

Views

Author

R. H. Hardin Nov 22 2011

Keywords

Comments

Column 5 of A200777

Examples

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

A200769 Number of n X n 0..2 arrays with every row and column running average nondecreasing rightwards and downwards, and the number of instances of each value within one of each other.

Original entry on oeis.org

3, 5, 13, 342, 7725, 91755, 17965438, 2189118202, 159001066390
Offset: 1

Views

Author

R. H. Hardin, Nov 22 2011

Keywords

Comments

Diagonal of A200777.

Examples

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

Crossrefs

Cf. A200777.

A200775 Number of nX6 0..2 arrays with every row and column running average nondecreasing rightwards and downwards, and the number of instances of each value within one of each other.

Original entry on oeis.org

6, 31, 217, 1806, 13422, 91755, 633413, 4472626, 30905995, 209517906, 1388328518, 9240921228, 61120602235, 401793563633, 2619241322237, 17009669381881, 110033650331158, 709134941588286
Offset: 1

Views

Author

R. H. Hardin Nov 22 2011

Keywords

Comments

Column 6 of A200777

Examples

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

A200776 Number of nX7 0..2 arrays with every row and column running average nondecreasing rightwards and downwards, and the number of instances of each value within one of each other.

Original entry on oeis.org

22, 144, 553, 18801, 194535, 633413, 17965438, 171117355, 537341613, 14614583388, 131765851682, 394325986469, 10509921268682, 92675532048204
Offset: 1

Views

Author

R. H. Hardin Nov 22 2011

Keywords

Comments

Column 7 of A200777

Examples

			Some solutions for n=4
..0..0..0..0..0..0..2....0..0..0..0..0..0..1....0..0..0..0..1..1..1
..0..1..1..2..1..2..2....0..0..1..1..1..1..1....0..0..0..2..1..1..2
..0..1..1..1..2..2..2....0..0..2..1..2..1..2....0..0..0..1..2..1..2
..0..1..2..1..1..2..2....1..2..2..2..2..2..2....1..1..2..2..2..2..2
		
Showing 1-8 of 8 results.