A205903 Number of (n+1)X3 0..2 arrays with the number of clockwise edge increases in every 2X2 subblock the same

369, 2943, 24045, 201324, 1712907, 14747754, 128014116, 1117395426, 9789931593, 85987653345, 756504850728, 6662896047993, 58725710260422, 517845692413770, 4567816196479464, 40300129771090119, 355601159005303077

Offset

1,1

Comments

Column 2 of A205909

Links

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

Formula

Empirical: a(n) = 17*a(n-1) -86*a(n-2) +117*a(n-3) +90*a(n-4) -446*a(n-5) +619*a(n-6) -476*a(n-7) +234*a(n-8) -92*a(n-9) +24*a(n-10) for n>11

Example

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

Crossrefs

Sequence in context: A183351 A275170 A205911 * A237844 A255202 A255194

Adjacent sequences: A205900 A205901 A205902 * A205904 A205905 A205906

Keyword

nonn

Author

R. H. Hardin Feb 01 2012

Status

approved