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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A266940 Number of 7Xn binary arrays with rows lexicographically nondecreasing and columns lexicographically nondecreasing and row sums nondecreasing and column sums nonincreasing.

Original entry on oeis.org

8, 42, 182, 794, 3566, 15850, 68890, 288333, 1155281, 4410923, 16029008, 55677559, 184683538, 588011958
Offset: 1

Views

Author

R. H. Hardin, Jan 06 2016

Keywords

Comments

Row 7 of A266935.

Examples

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

Crossrefs

Cf. A266935.
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