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A237370 Number of (n+1)X(3+1) 0..2 arrays with the maximum plus the upper median plus the lower median plus the minimum of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one 1
1024, 4760, 22676, 116880, 597492, 3049632, 15573476, 80201408, 411286836, 2099304960, 10729460820, 55269328800, 283525603492, 1447353862496, 7398722121284, 38126239186720, 195635060216484, 998817510951744 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A237375

LINKS

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

FORMULA

Empirical: a(n) = 1564*a(n-4) -747073*a(n-8) +111088396*a(n-12) -8474399747*a(n-16) +395014705516*a(n-20) -12200813483051*a(n-24) +260237478196460*a(n-28) -3910838038088336*a(n-32) +41692053218771904*a(n-36) -314601993651065152*a(n-40) +1666350374235368704*a(n-44) -6122043810041542656*a(n-48) +15393880291002724352*a(n-52) -26078740876304560128*a(n-56) +29011441580998115328*a(n-60) -20170260434720194560*a(n-64) +7882073405327409152*a(n-68) -1264135601955799040*a(n-72) -77945556453818368*a(n-76) +37076376167120896*a(n-80) -1030466538831872*a(n-84) -153055186124800*a(n-88) +7219840024576*a(n-92) for n>94

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Sequence in context: A257650 A255664 A195004 * A135289 A189071 A214800

Adjacent sequences:  A237367 A237368 A237369 * A237371 A237372 A237373

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 07 2014

STATUS

approved

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Last modified May 26 19:14 EDT 2019. Contains 323597 sequences. (Running on oeis4.)