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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A202747 Number of 6Xn 0..1 arrays with row sums equal and column sums unequal to adjacent columns.

Original entry on oeis.org

2, 44, 1074, 29680, 827502, 27842760, 967878370, 35772388788, 1349807335782, 52493731492612
Offset: 1

Views

Author

R. H. Hardin Dec 23 2011

Keywords

Comments

Row 6 of A202742

Examples

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

A202748 Number of 7 X n 0..1 arrays with row sums equal and column sums unequal to adjacent columns.

Original entry on oeis.org

2, 128, 2802, 183220, 8870150, 578826040, 37121438930, 2639009446600
Offset: 1

Views

Author

R. H. Hardin Dec 23 2011

Keywords

Comments

Row 7 of A202742.

Examples

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

Crossrefs

Cf. A202742.
Previous Showing 11-12 of 12 results.

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