A184222 Half the number of (n+1)X(n+1) 0..3 arrays with every 2X2 subblock diagonal sum differing from its antidiagonal sum by more than 3

15, 411, 20958, 4207437, 2100723171, 3390680573862, 15315046904131217, 208931377551712553029, 8272310043853147026573208, 970110871920573518964680291007, 333510642857168957639513329116920351

Offset

1,1

Comments

Diagonal of A184231

Links

Table of n, a(n) for n=1..11.

Example

Some solutions for 3X3
..0..3..1....1..0..3....1..3..1....3..1..2....3..0..2....2..1..3....3..0..2
..2..0..3....0..3..0....2..0..2....0..3..0....0..3..0....0..3..0....0..2..0
..0..2..1....1..0..1....0..2..0....3..2..3....3..2..3....3..2..3....2..0..3

Crossrefs

Sequence in context: A279133 A034675 A216343 * A069431 A133791 A361284

Adjacent sequences: A184219 A184220 A184221 * A184223 A184224 A184225

Keyword

nonn

Author

R. H. Hardin Jan 10 2011

Status

approved