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.

A221926 Number of nX3 arrays of occupancy after each element stays put or moves to some horizontal, diagonal or antidiagonal neighbor, without move-in move-out straight through or left turns.

Original entry on oeis.org

6, 232, 5748, 153652, 4053833, 107220027, 2834169558, 74925759485, 1980733759947, 52362769529788, 1384263535086577, 36594432454954146, 967411477937300180, 25574518045138377146, 676088703977133126785
Offset: 1

Views

Author

R. H. Hardin Feb 01 2013

Keywords

Comments

Column 3 of A221929

Examples

			Some solutions for n=3
..0..2..0....0..1..1....1..2..0....0..3..0....0..4..1....0..1..1....0..2..1
..0..1..1....1..3..0....1..2..1....0..2..1....0..1..0....0..5..0....0..2..2
..2..2..1....2..1..0....1..1..0....0..1..2....1..1..1....2..0..0....0..1..1
		

A221927 Number of nX4 arrays of occupancy after each element stays put or moves to some horizontal, diagonal or antidiagonal neighbor, without move-in move-out straight through or left turns.

Original entry on oeis.org

13, 2197, 201378, 20246283, 2007184132, 199492714651, 19816266524892, 1968651817039048, 195572208446932549, 19428830291892380296, 1930127245301117267451, 191745542191155118363255
Offset: 1

Views

Author

R. H. Hardin Feb 01 2013

Keywords

Comments

Column 4 of A221929

Examples

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

A221930 Number of 2Xn arrays of occupancy after each element stays put or moves to some horizontal, diagonal or antidiagonal neighbor, without move-in move-out straight through or left turns.

Original entry on oeis.org

1, 25, 232, 2197, 20933, 198589, 1885324, 17896442, 169874679, 1612469540, 15305706000, 145283086944, 1379039583394, 13089962041815, 124251041949203, 1179401540313291, 11194980504773785, 106263714435179508
Offset: 1

Views

Author

R. H. Hardin Feb 01 2013

Keywords

Comments

Row 2 of A221929

Examples

			Some solutions for n=3
..1..2..0....2..1..0....0..0..1....0..0..1....0..1..2....2..2..1....1..1..3
..0..3..0....1..1..1....0..5..0....0..3..2....0..2..1....0..1..0....0..0..1
		

Formula

Empirical: a(n) = 9*a(n-1) +10*a(n-2) -45*a(n-3) -57*a(n-4) +45*a(n-5) -3*a(n-6) -616*a(n-7) -57*a(n-8) +1200*a(n-9) -268*a(n-10) -289*a(n-11) -9*a(n-12) +6*a(n-13)

A221931 Number of 3Xn arrays of occupancy after each element stays put or moves to some horizontal, diagonal or antidiagonal neighbor, without move-in move-out straight through or left turns.

Original entry on oeis.org

1, 184, 5748, 201378, 6888458, 236114556, 8089630790, 277061308667, 9488649958342, 324954778576668, 11128548401493743, 381112186997579115, 13051688407062314783, 446972092491243621991, 15307140370408977681367
Offset: 1

Views

Author

R. H. Hardin Feb 01 2013

Keywords

Comments

Row 3 of A221929

Examples

			Some solutions for n=3
..0..0..0....1..2..0....1..2..0....0..0..0....0..5..0....1..0..0....1..3..1
..2..4..1....2..1..2....0..1..2....1..4..2....1..2..0....2..2..0....0..0..0
..2..0..0....0..0..1....1..0..2....1..1..0....1..0..0....0..4..0....2..0..2
		

A221928 Number of nX5 arrays of occupancy after each element stays put or moves to some horizontal, diagonal or antidiagonal neighbor, without move-in move-out straight through or left turns.

Original entry on oeis.org

28, 20933, 6888458, 2568601026, 938516646422, 344170748565832, 126100252425009531, 46209296640385349436, 16932783333617347990176
Offset: 1

Views

Author

R. H. Hardin Feb 01 2013

Keywords

Comments

Column 5 of A221929

Examples

			Some solutions for n=3
..0..0..1..1..1....0..0..3..0..1....0..3..0..0..2....0..0..3..0..0
..0..5..1..0..0....0..2..1..3..1....0..4..1..2..2....0..3..0..3..1
..0..0..1..4..1....0..4..0..0..0....0..1..0..0..0....0..2..2..0..1
		

A221932 Number of 4Xn arrays of occupancy after each element stays put or moves to some horizontal, diagonal or antidiagonal neighbor, without move-in move-out straight through or left turns.

Original entry on oeis.org

1, 1367, 153652, 20246283, 2568601026, 326363935235, 41397744561659, 5246761195398438, 664828879659318271, 84233175060135140710
Offset: 1

Views

Author

R. H. Hardin Feb 01 2013

Keywords

Comments

Row 4 of A221929

Examples

			Some solutions for n=3
..1..1..2....1..0..1....0..2..1....1..0..2....0..1..1....1..1..2....0..0..2
..0..0..1....1..1..1....0..1..2....2..0..1....0..1..1....0..0..1....0..6..0
..0..3..2....0..1..1....1..1..1....0..1..0....0..2..1....1..1..4....1..1..0
..0..2..0....1..3..1....0..1..2....1..2..2....2..2..1....0..1..0....0..1..1
		
Showing 1-6 of 6 results.