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A236665 Number of (n+1)X(2+1) 0..2 arrays colored with the maximum plus the lower median minus the upper median minus the minimum of every 2X2 subblock 1
452, 3720, 30352, 250708, 2079296, 17174856, 141244420, 1164128912, 9621726624, 79482813380, 655231830400, 5401567597688, 44585646697668, 368127909661952, 3037143174811536, 25048761635649892, 206675846777470992 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 2 of A236669
LINKS
FORMULA
Empirical: a(n) = 2*a(n-2) +65*a(n-3) +2268*a(n-4) +9820*a(n-5) +28192*a(n-6) +67800*a(n-7) -62168*a(n-8) -623456*a(n-9) -512512*a(n-10) +1674752*a(n-11) +5791232*a(n-12) +13304832*a(n-13) +17710080*a(n-14) +8847360*a(n-15)
EXAMPLE
Some solutions for n=3
..1..2..1....2..1..1....1..2..0....2..1..2....0..2..1....1..1..2....1..2..0
..2..1..0....0..1..0....0..1..0....0..0..1....0..1..2....0..0..0....0..2..2
..1..0..0....2..0..1....0..0..1....2..0..2....0..1..1....0..1..1....1..1..2
..1..1..1....0..2..2....2..0..0....1..2..0....2..2..0....0..1..0....1..1..0
CROSSREFS
Sequence in context: A183636 A222823 A205209 * A318627 A206217 A233228
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 29 2014
STATUS
approved

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Last modified July 20 18:59 EDT 2024. Contains 374459 sequences. (Running on oeis4.)