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.

A183415 Number of nX2 0..2 arrays with each sum of a(1..i,1..j) no greater than i*j.

Original entry on oeis.org

5, 34, 249, 1920, 15232, 123323, 1012996, 8413325, 70482133, 594587235, 5044756083, 43007895169, 368151018388, 3162466934006, 27248906449457, 235414313839524, 2038652180610193, 17691623325368274, 153819626587560407
Offset: 1

Views

Author

R. H. Hardin Jan 04 2011

Keywords

Comments

Column 2 of A183419

Examples

			Some solutions for 4X2
..0..0....1..0....1..0....0..0....1..0....0..0....1..0....0..2....0..1....0..0
..2..2....1..0....0..2....1..2....0..1....0..0....0..2....2..0....0..0....2..2
..1..0....1..2....0..2....0..1....1..0....0..2....1..2....0..1....2..0....0..1
..1..0....0..2....2..0....2..2....1..2....2..0....0..2....0..0....0..0....0..1
		

A183416 Number of nX3 0..2 arrays with each sum of a(1..i,1..j) no greater than i*j.

Original entry on oeis.org

13, 249, 5257, 118128, 2748326, 65521060, 1589310971, 39061152272, 969912553822, 24282796177101, 612070344280674, 15515224313870804, 395180940568952691, 10106978903439648223, 259417022176683830195, 6679368104700699189613
Offset: 1

Views

Author

R. H. Hardin Jan 04 2011

Keywords

Comments

Column 3 of A183419

Examples

			Some solutions for 4X3
..1..0..0....0..1..2....0..1..2....1..1..0....0..0..1....1..0..2....1..0..1
..1..0..0....1..0..1....0..1..1....1..0..2....2..1..0....1..2..0....1..0..2
..1..2..2....0..0..2....1..0..0....1..0..2....0..1..2....1..0..0....0..2..2
..1..1..0....1..1..1....2..1..0....1..2..0....2..1..1....1..0..1....0..2..0
		

A183417 Number of nX4 0..2 arrays with each sum of a(1..i,1..j) no greater than i*j.

Original entry on oeis.org

35, 1920, 118128, 7798591, 535504390, 37791169786, 2719090433234, 198527626261156, 14661270464301970, 1092691428398410348, 82050496246290924387, 6199895182931575557720, 470968211438917677149130
Offset: 1

Views

Author

R. H. Hardin Jan 04 2011

Keywords

Comments

Column 4 of A183419

Examples

			Some solutions for 6X4
..0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0
..0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0
..0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0
..0..0..0..2....0..0..2..1....0..0..1..2....0..0..2..2....0..1..0..1
..1..0..0..0....2..2..2..0....2..1..2..2....1..0..2..1....0..1..1..0
..1..0..0..0....1..2..1..1....2..2..1..1....2..2..2..0....1..2..0..2
		

A183418 Number of n X 5 0..2 arrays with each sum of a(1..i,1..j) no greater than i*j.

Original entry on oeis.org

96, 15232, 2748326, 535504390, 108917015732, 22819790947743, 4882354760830113, 1061262556019472565, 233540084105702534983, 51902083367733896338751, 11628306862159911222856791, 2622857292112189173922446856
Offset: 1

Views

Author

R. H. Hardin, Jan 04 2011

Keywords

Comments

Column 5 of A183419.

Examples

			Some solutions for 4 X 5
..0..0..0..0..0....0..0..0..0..0....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
..1..1..2..2..1....2..2..0..0..2....1..1..2..0..2....0..1..0..2..2
..1..2..2..2..1....0..2..1..1..0....0..2..1..0..1....2..2..0..1..0
		

Crossrefs

Cf. A183419.

A183414 Number of n X n 0..2 arrays with each sum of a(1..i,1..j) no greater than i*j.

Original entry on oeis.org

2, 34, 5257, 7798591, 108917015732, 14221257369534380, 17218452637947555486763
Offset: 1

Views

Author

R. H. Hardin Jan 04 2011

Keywords

Comments

Diagonal of A183419

Examples

			Some solutions for 4X4
..0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0
..0..0..1..2....0..1..1..1....0..0..2..1....0..1..1..1....0..0..1..2
..0..0..1..0....1..2..0..2....2..0..2..1....2..2..2..2....1..2..1..1
..1..0..2..2....1..0..2..2....0..1..1..2....0..1..1..1....0..2..2..1
		
Showing 1-5 of 5 results.