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A236199 Number of (n+1)X(1+1) 0..3 arrays colored with the maximum plus the upper median minus the lower median minus the minimum of every 2X2 subblock 1
256, 3020, 35874, 427680, 5098640, 60725856, 723344402, 8617376624, 102659701914, 1222955615632, 14568798764580, 173556031634952, 2067546134560766, 24630307231347920, 293416564842646058 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 1 of A236202
LINKS
FORMULA
Empirical: a(n) = a(n-1) +19*a(n-2) +483*a(n-3) +6515*a(n-4) +30487*a(n-5) +130534*a(n-6) +268052*a(n-7) -1853784*a(n-8) -10798260*a(n-9) -40876008*a(n-10) -100945632*a(n-11) +217780976*a(n-12) +1450894176*a(n-13) +3234709632*a(n-14) +5425161856*a(n-15) -12402266368*a(n-16) -67991835648*a(n-17) -74628667392*a(n-18) -3822813184*a(n-19) +259752861696*a(n-20) +812620038144*a(n-21) +144847536128*a(n-22) -1801215803392*a(n-23) -1109966979072*a(n-24) +1391295725568*a(n-25) +1079802593280*a(n-26) -338379669504*a(n-27) -293534171136*a(n-28)
EXAMPLE
Some solutions for n=3
..2..2....2..2....2..0....2..2....3..0....2..1....3..0....3..0....1..2....3..0
..1..3....3..1....3..3....2..0....1..3....1..1....3..2....0..1....0..0....1..0
..3..2....1..3....2..3....3..0....0..1....3..3....2..1....2..2....2..2....3..3
..2..1....0..3....3..1....1..0....3..0....3..1....3..3....0..2....3..2....0..0
CROSSREFS
Sequence in context: A235506 A235502 A236202 * A188823 A205935 A205928
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 20 2014
STATUS
approved

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Last modified May 30 14:00 EDT 2024. Contains 372968 sequences. (Running on oeis4.)