A251250 Number of (n+1)X(n+1) 0..1 arrays with every 2X2 subblock having a single 1 or two 1s on the same edge

8, 56, 464, 9130, 185620, 10753448, 539961360, 93638134256, 11614033584212, 6069296782136816, 1858635679067134948, 2934840645254762222638, 2219326155667975726270428, 10595742529538275240832027216

Offset

1,1

Comments

Diagonal of A251258

Links

R. H. Hardin, Table of n, a(n) for n = 1..17

Example

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

Crossrefs

Sequence in context: A027081 A093134 A001398 * A087290 A086787 A218125

Adjacent sequences: A251247 A251248 A251249 * A251251 A251252 A251253

Keyword

nonn

Author

R. H. Hardin, Dec 01 2014

Status

approved