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 1-3 of 3 results.

A222839 Number of n X 2 0..3 arrays with no more than n elements equal to at least one horizontal or vertical neighbor, with new values introduced in row major 0..3 order.

Original entry on oeis.org

1, 8, 105, 1585, 23107, 353631, 5338646, 81874696, 1252153841, 19270376854, 296641979113, 4580055753005, 70780702170260, 1095722113681548, 16978656325074532, 263390892198118920, 4089414898741050209, 63545865459514492673, 988136631583140164460, 15375690197520184535506
Offset: 1

Views

Author

R. H. Hardin, Mar 06 2013

Keywords

Examples

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

Crossrefs

Column 2 of A222842.

A222840 Number of nX3 0..3 arrays with no more than floor(nX3/2) elements equal to at least one horizontal or vertical neighbor, with new values introduced in row major 0..3 order.

Original entry on oeis.org

2, 105, 4797, 326408, 15364848, 1077545438, 52487425596, 3689615795056, 182579365380505, 12856303224433084, 643621625467714042, 45333053732314073754, 2288743268254953421250, 161184278096856509113288
Offset: 1

Views

Author

R. H. Hardin Mar 06 2013

Keywords

Comments

Column 3 of A222842

Examples

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

A222841 Number of n X 4 0..3 arrays with no more than floor(n X 4/2) elements equal to at least one horizontal or vertical neighbor, with new values introduced in row major 0..3 order.

Original entry on oeis.org

11, 1585, 326408, 70144361, 15371324917, 3410802057085, 763478480305913, 172013012570239087, 38951066890039501260, 8855947103673731502351, 2020193746874015711217978, 462122926444094400382307495
Offset: 1

Views

Author

R. H. Hardin Mar 06 2013

Keywords

Comments

Column 4 of A222842.

Examples

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

Crossrefs

Cf. A222842.
Showing 1-3 of 3 results.