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A233992 Number of (n+1)X(3+1) 0..6 arrays with every 2X2 subblock having the sum of the absolute values of all six edge and diagonal differences equal to 18 1
3496, 11622, 38220, 150572, 578992, 2642176, 11510748, 59677576, 286598096, 1625122820, 8327165492, 49678143548, 264612547304, 1617434567048, 8813023956528, 54391352548384, 300504986392076, 1859027129125504 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A233997

LINKS

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

EXAMPLE

Some solutions for n=4

..0..5..0..2....3..6..3..0....4..1..3..6....4..1..1..4....2..5..0..3

..5..6..5..5....6..1..6..3....1..6..6..1....1..6..0..5....1..6..5..0

..0..5..0..6....3..6..3..0....6..3..1..4....6..3..3..0....1..0..5..2

..1..4..1..1....0..3..0..5....1..6..6..1....1..6..0..5....1..6..5..0

..6..1..6..0....3..6..3..0....3..6..0..1....2..5..5..6....1..0..5..2

CROSSREFS

Sequence in context: A249525 A252049 A108117 * A203845 A257316 A224724

Adjacent sequences:  A233989 A233990 A233991 * A233993 A233994 A233995

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 18 2013

STATUS

approved

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Last modified February 26 17:19 EST 2020. Contains 332293 sequences. (Running on oeis4.)