A205461 Number of (n+1)X4 0..3 arrays with the number of clockwise edge increases in every 2X2 subblock differing from each horizontal or vertical neighbor

17920, 597288, 22414008, 843904488, 31625643196, 1185601231024, 44457471151176, 1666962268642872, 62503467236310480, 2343599232293623768, 87874636404562102448, 3294903243596850745368, 123544317033939549370912

Offset

1,1

Comments

Column 3 of A205466

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

Some solutions for n=4
..3..1..3..0....0..3..3..0....0..0..1..2....1..1..3..2....1..0..0..0
..1..1..0..0....1..0..1..2....3..3..0..3....0..0..1..1....0..3..3..2
..3..2..3..2....1..1..0..3....3..3..3..1....2..1..1..1....1..1..0..0
..2..2..1..1....1..1..3..2....0..2..1..1....1..1..1..2....1..1..3..1
..2..2..1..1....1..2..0..0....3..3..3..2....0..3..0..0....1..3..0..1

Crossrefs

Sequence in context: A258950 A258949 A205950 * A345869 A345585 A345842

Adjacent sequences: A205458 A205459 A205460 * A205462 A205463 A205464

Keyword

nonn

Author

R. H. Hardin Jan 27 2012

Status

approved