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A236877 Number of (n+1)X(1+1) 0..2 arrays with the maximum plus the upper median plus the lower median of every 2X2 subblock equal 1
81, 211, 537, 1523, 4309, 12723, 37701, 113771, 344885, 1055235, 3241909, 10016411, 31053157, 96649875, 301652453, 944231531, 2962345045, 9314825443, 29344133653, 92608555963, 292718067013, 926588796211, 2936874197061, 9319996691467 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 1 of A236884

LINKS

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

FORMULA

Empirical: a(n) = 7*a(n-1) +8*a(n-2) -146*a(n-3) +101*a(n-4) +1205*a(n-5) -1580*a(n-6) -5058*a(n-7) +8248*a(n-8) +11528*a(n-9) -21176*a(n-10) -13840*a(n-11) +27808*a(n-12) +7360*a(n-13) -16768*a(n-14) -768*a(n-15) +3072*a(n-16)

EXAMPLE

Some solutions for n=5

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

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

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

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

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

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

CROSSREFS

Sequence in context: A044794 A236884 A236728 * A236721 A255110 A062532

Adjacent sequences:  A236874 A236875 A236876 * A236878 A236879 A236880

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 01 2014

STATUS

approved

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Last modified September 27 22:36 EDT 2020. Contains 337388 sequences. (Running on oeis4.)