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A236647 Number of (n+1)X(2+1) 0..2 arrays colored with the maximum plus the upper median minus the lower median minus the minimum of every 2X2 subblock 1
484, 4500, 41980, 394380, 3668492, 34234336, 319904840, 2991463632, 27901011760, 260484793448, 2433205784152, 22729004719568, 212171486821248, 1981136638265476, 18502116150459608, 172787369160052104 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A236651

LINKS

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

FORMULA

Empirical: a(n) = 13*a(n-2) +184*a(n-3) +3506*a(n-4) +9110*a(n-5) +21587*a(n-6) +63605*a(n-7) -342128*a(n-8) -864643*a(n-9) +1140624*a(n-10) +294974*a(n-11) +739053*a(n-12) +15509266*a(n-13) -16660349*a(n-14) -37563062*a(n-15) +41074149*a(n-16) -39645704*a(n-17) -48556860*a(n-18) +140778823*a(n-19) -72899036*a(n-20) -67241570*a(n-21) +329687733*a(n-22) -46469782*a(n-23) -133466871*a(n-24) +319656720*a(n-25) -408928291*a(n-26) -40519358*a(n-27) +151099557*a(n-28) -160188966*a(n-29) +104521624*a(n-30) -63973040*a(n-31) -163603316*a(n-32) +759648*a(n-33) +12746672*a(n-34)

EXAMPLE

Some solutions for n=3

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

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

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

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

CROSSREFS

Sequence in context: A199330 A281398 A014803 * A237078 A085120 A250614

Adjacent sequences:  A236644 A236645 A236646 * A236648 A236649 A236650

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 29 2014

STATUS

approved

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Last modified October 20 02:52 EDT 2019. Contains 328244 sequences. (Running on oeis4.)