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A236868 Number of (n+1)X(1+1) 0..2 arrays with the maximum plus the upper median minus the lower median of every 2X2 subblock equal 1
81, 287, 1069, 4131, 16153, 63867, 253269, 1008347, 4017129, 16029051, 63964053, 255428971, 1020001673, 4074620555, 16277074485, 65036521755, 259868094441, 1038512291675, 4150437015637, 16589196684619, 66311024500553 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 1 of A236875

LINKS

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

FORMULA

Empirical: a(n) = 7*a(n-1) +13*a(n-2) -169*a(n-3) +51*a(n-4) +1481*a(n-5) -1425*a(n-6) -5803*a(n-7) +7222*a(n-8) +10368*a(n-9) -14764*a(n-10) -7052*a(n-11) +12456*a(n-12) +464*a(n-13) -3232*a(n-14) +128*a(n-15) +256*a(n-16)

EXAMPLE

Some solutions for n=5

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

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

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

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

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

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

CROSSREFS

Sequence in context: A236809 A236802 A236875 * A237375 A237368 A017078

Adjacent sequences:  A236865 A236866 A236867 * A236869 A236870 A236871

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 01 2014

STATUS

approved

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Last modified April 25 16:08 EDT 2019. Contains 322461 sequences. (Running on oeis4.)