A234424 Number of (n+1)X(1+1) 0..7 arrays with every 2X2 subblock having the sum of the absolute values of the edge differences equal to 14 and no adjacent elements equal

448, 4516, 44140, 453728, 4641220, 47946684, 494928936, 5118554604, 52929477520, 547525514800, 5663733188684, 58591028515180, 606119482599020, 6270340071097572, 64866996054961716, 671054166304469780

Offset

1,1

Comments

Column 1 of A234428

Links

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

Formula

Empirical: a(n) = 9*a(n-1) +64*a(n-2) -451*a(n-3) -1542*a(n-4) +7659*a(n-5) +16809*a(n-6) -48643*a(n-7) -76610*a(n-8) +75468*a(n-9) +91816*a(n-10) -33928*a(n-11) -30960*a(n-12)

Example

Some solutions for n=3
..2..0....7..0....4..7....0..6....1..5....7..5....0..3....6..7....6..7....5..0
..5..7....6..1....0..6....3..7....0..7....0..2....7..6....2..0....0..6....3..5
..0..3....2..4....2..7....0..2....5..6....7..4....6..0....7..3....4..7....5..0
..2..7....6..1....0..3....5..0....7..1....1..5....7..6....5..0....0..1....7..6

Crossrefs

Sequence in context: A048632 A366815 A234428 * A234175 A234170 A120104

Adjacent sequences: A234421 A234422 A234423 * A234425 A234426 A234427

Keyword

nonn

Author

R. H. Hardin, Dec 25 2013

Status

approved