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A233646 Number of (n+1)X(1+1) 0..5 arrays with every 2X2 subblock having the sum of the squares of the edge differences equal to 14 1
144, 772, 3984, 20936, 108864, 570208, 2971200, 15541312, 81063040, 423704496, 2211225408, 11553144144, 60311293088, 315043601664, 1644900877696, 8591310050640, 44860831279136, 234292373710800, 1223453493401024 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 1 of A233653

LINKS

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

FORMULA

Empirical: a(n) = 2*a(n-1) +31*a(n-2) -36*a(n-3) -261*a(n-4) +206*a(n-5) +714*a(n-6) -356*a(n-7) -528*a(n-8) +256*a(n-9)

EXAMPLE

Some solutions for n=5

..1..3....1..2....0..1....0..3....1..2....0..2....1..4....2..1....1..4....5..3

..0..0....1..4....3..3....0..1....4..4....3..3....2..4....2..4....3..3....2..2

..1..3....2..4....1..4....3..3....2..5....2..5....2..5....5..4....4..1....5..4

..1..4....1..1....1..2....5..2....2..4....3..3....4..5....2..4....4..3....5..2

..1..3....3..0....4..4....3..2....2..1....1..0....2..2....2..1....4..1....3..3

..4..3....2..2....5..2....5..2....4..4....3..3....5..3....4..1....2..2....1..4

CROSSREFS

Sequence in context: A250428 A033696 A233653 * A268806 A112067 A210724

Adjacent sequences:  A233643 A233644 A233645 * A233647 A233648 A233649

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 14 2013

STATUS

approved

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Last modified August 10 13:12 EDT 2022. Contains 356039 sequences. (Running on oeis4.)