A251193 Number of (n+1)X(n+1) 0..1 arrays with no 2X2 subblock having the minimum of its diagonal elements less than the absolute difference of its antidiagonal elements

10, 86, 1654, 73170, 7392190, 1688254298, 871573835362, 1016396169840162, 2677928828235940878, 15939286491629789077436, 214333474893685389914820434, 6511102783725658099829377229314, 446854251204340727817177223022169346

Offset

1,1

Comments

Diagonal of A251201

Links

R. H. Hardin, Table of n, a(n) for n = 1..20

Example

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

Crossrefs

Sequence in context: A321853 A264174 A218894 * A198858 A331793 A121115

Adjacent sequences: A251190 A251191 A251192 * A251194 A251195 A251196

Keyword

nonn

Author

R. H. Hardin, Nov 30 2014

Status

approved