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A236605 Number of (n+1)X(2+1) 0..2 arrays colored with the maximum plus the lower median minus the minimum of every 2X2 subblock 1
426, 3056, 21814, 157852, 1148940, 8334390, 60321850, 437145312, 3170639968, 22986654954, 166589069278, 1207529662436, 8754117362818, 63459178604360, 459991788481964, 3334414119424578, 24171289384341708, 175216213885020152 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A236610

LINKS

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

FORMULA

Empirical: a(n) = 109*a(n-3) +1108*a(n-4) +3889*a(n-5) +14249*a(n-6) +28939*a(n-7) -17127*a(n-8) -172863*a(n-9) -670167*a(n-10) -1382408*a(n-11) +296591*a(n-12) +5438289*a(n-13) +11641832*a(n-14) +10730212*a(n-15) -21846848*a(n-16) -68907209*a(n-17) -54295868*a(n-18) +70288829*a(n-19) +252018085*a(n-20) +188974573*a(n-21) -282707596*a(n-22) -660413331*a(n-23) -256622389*a(n-24) +810114857*a(n-25) +1019574008*a(n-26) -356795815*a(n-27) -1213300047*a(n-28) -175143480*a(n-29) +813009083*a(n-30) +323733104*a(n-31) -352983365*a(n-32) -223632713*a(n-33) +75053692*a(n-34) +107006082*a(n-35) -5715579*a(n-36) -24600924*a(n-37) +5658819*a(n-38) -2140420*a(n-39) -1011228*a(n-40) -5680*a(n-41) +2176*a(n-42)

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Sequence in context: A305267 A045094 A252411 * A236699 A173374 A227484

Adjacent sequences:  A236602 A236603 A236604 * A236606 A236607 A236608

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 29 2014

STATUS

approved

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Last modified January 17 22:39 EST 2019. Contains 319251 sequences. (Running on oeis4.)