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A233961 Number of (n+1) X (2+1) 0..3 arrays with every 2 X 2 subblock having the sum of the absolute values of all six edge and diagonal differences equal to 10. 1
188, 864, 3976, 20564, 106056, 587472, 3219000, 18340844, 103336120, 594474624, 3391176148, 19563928568, 112234856476, 647875877440, 3726750502572, 21511723279236, 123905848668112, 715090108241552, 4121677019141208 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A233967.

LINKS

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

FORMULA

Empirical: a(n) = 9*a(n-1) +6*a(n-2) -231*a(n-3) +402*a(n-4) +1164*a(n-5) -3026*a(n-6) -973*a(n-7) +5685*a(n-8) -1687*a(n-9) -2838*a(n-10) +1862*a(n-11) -188*a(n-12) -88*a(n-13) +16*a(n-14).

EXAMPLE

Some solutions for n=5:

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

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

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

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

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

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

CROSSREFS

Sequence in context: A211814 A335592 A233786 * A073586 A064115 A185241

Adjacent sequences:  A233958 A233959 A233960 * A233962 A233963 A233964

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 18 2013

STATUS

approved

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Last modified August 3 06:43 EDT 2021. Contains 346435 sequences. (Running on oeis4.)