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A200803 Number of nX2 0..2 arrays with no average of any element and its diagonal, antidiagonal, horizontal and vertical neighbors equal to one 1
6, 62, 378, 2758, 21028, 152410, 1123856, 8320912, 61313142, 452500906, 3340771202, 24653586076, 181959666062, 1343028411144, 9912362521336, 73160174987386, 539975059887262, 3985391431572110, 29414994393633268 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A200809

LINKS

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

FORMULA

Empirical: a(n) = 6*a(n-1) +7*a(n-2) +59*a(n-3) -221*a(n-4) -254*a(n-5) -396*a(n-6) +276*a(n-7) +1752*a(n-8) -7344*a(n-9) +13392*a(n-10) +4320*a(n-11) -3456*a(n-12)

EXAMPLE

Some solutions for 3X3

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

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

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

CROSSREFS

Sequence in context: A022502 A272956 A243643 * A198965 A144063 A186670

Adjacent sequences:  A200800 A200801 A200802 * A200804 A200805 A200806

KEYWORD

nonn

AUTHOR

R. H. Hardin Nov 22 2011

STATUS

approved

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Last modified September 21 04:58 EDT 2020. Contains 337267 sequences. (Running on oeis4.)