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.

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A276304 Number of 7Xn 0..2 arrays with no element equal to any value at offset (-2,-1) (-1,1) or (0,-1) and new values introduced in order 0..2.

Original entry on oeis.org

365, 710, 14693, 203933, 3861469, 61239977, 1073114625, 17768699385, 303744206293, 5099725153529, 86493302028957, 1458615553542913, 24677069062558769, 416736142368242189, 7044833158816604637
Offset: 1

Views

Author

R. H. Hardin, Aug 28 2016

Keywords

Comments

Row 7 of A276299.

Examples

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

Crossrefs

Cf. A276299.

Formula

Empirical recurrence of order 59 (see link above)

A276292 Number of n X n 0..2 arrays with no element equal to any value at offset (-2,-1), (-1,1) or (0,-1) and new values introduced in order 0..2.

Original entry on oeis.org

1, 4, 45, 1017, 50949, 4988145, 1073114625, 456837553545, 427500156271073, 794420496019076757, 3247016064162495298253
Offset: 1

Views

Author

R. H. Hardin, Aug 28 2016

Keywords

Comments

Diagonal of A276299.

Examples

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

Crossrefs

Cf. A276299.
Previous Showing 11-12 of 12 results.