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A234028 Number of (n+1)X(n+1) 0..4 arrays with every 2X2 subblock having the absolute values of all six edge and diagonal differences no larger than 1 1
61, 3059, 591711, 454996327, 1394283842243, 17100147398257787, 841477590887025128591, 166464986867345392587609693, 132584609704248220162949309257517 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A234036

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..10

EXAMPLE

Some solutions for n=2

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

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

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

CROSSREFS

Sequence in context: A078962 A000508 A191092 * A135647 A269025 A207231

Adjacent sequences:  A234025 A234026 A234027 * A234029 A234030 A234031

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 18 2013

STATUS

approved

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Last modified October 23 01:24 EDT 2018. Contains 316518 sequences. (Running on oeis4.)