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A237482 Number of (n+1)X(1+1) 0..3 arrays with the maximum plus the minimum minus the lower median of every 2X2 subblock equal 1
256, 1464, 8770, 55318, 357516, 2371070, 15989568, 109427750, 756426182, 5270764010, 36928327652, 259801640390, 1832994682512, 12959452955886, 91756839230262, 650341057828618, 4612715227919740, 32733695978222310 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 1 of A237488
LINKS
FORMULA
Empirical: a(n) = 16*a(n-1) -4*a(n-2) -1098*a(n-3) +3534*a(n-4) +31470*a(n-5) -150217*a(n-6) -486590*a(n-7) +3128470*a(n-8) +4294420*a(n-9) -39521216*a(n-10) -19320464*a(n-11) +327973152*a(n-12) +737184*a(n-13) -1854427888*a(n-14) +533348544*a(n-15) +7251415712*a(n-16) -3402001408*a(n-17) -19611340544*a(n-18) +11522415744*a(n-19) +36170099200*a(n-20) -24140262144*a(n-21) -44042097664*a(n-22) +31789007872*a(n-23) +33267746816*a(n-24) -25107318784*a(n-25) -13828251648*a(n-26) +10436419584*a(n-27) +2480766976*a(n-28) -1587019776*a(n-29) -155189248*a(n-30)
EXAMPLE
Some solutions for n=4
..3..3....0..0....2..1....2..1....0..3....3..2....3..2....0..1....2..2....2..1
..0..0....0..3....3..1....3..0....2..2....1..2....2..1....1..3....1..1....3..3
..3..3....1..0....1..1....3..1....2..1....3..0....2..1....0..3....2..2....1..2
..0..0....0..3....1..3....0..1....2..2....1..2....2..3....2..1....1..1....3..3
..0..3....3..0....2..1....1..3....1..0....3..2....2..1....0..0....3..0....2..3
CROSSREFS
Sequence in context: A237951 A237946 A237488 * A237150 A237143 A333606
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 08 2014
STATUS
approved

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Last modified March 2 01:29 EST 2024. Contains 370447 sequences. (Running on oeis4.)