A233659 Number of (n+1)X(1+1) 0..6 arrays with every 2X2 subblock having the sum of the squares of the edge differences equal to 26

208, 1220, 6656, 37544, 208304, 1166748, 6498312, 36324956, 202569936, 1131482016, 6313043848, 35250544880, 196723994080, 1098286071192, 6129927083568, 34219962715316, 191004422241352, 1066229169116120

Offset

1,1

Comments

Column 1 of A233665

Links

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

Formula

Empirical: a(n) = 44*a(n-2) +30*a(n-3) -597*a(n-4) -498*a(n-5) +3495*a(n-6) +2968*a(n-7) -9305*a(n-8) -7532*a(n-9) +10204*a(n-10) +7424*a(n-11) -3232*a(n-12) -1792*a(n-13)

Example

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

Crossrefs

Sequence in context: A234549 A234543 A233665 * A230934 A236272 A184681

Adjacent sequences: A233656 A233657 A233658 * A233660 A233661 A233662

Keyword

nonn

Author

R. H. Hardin, Dec 14 2013

Status

approved