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A237231 Number of (n+1)X(5+1) 0..2 arrays with the maximum plus the minimum of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one 1
9628, 36180, 97862, 233536, 721854, 1737372, 5299502, 12992080, 40059070, 97555340, 300177654, 731229928, 2240228750, 5478702380, 16794581906, 41072728888, 125888770174, 307837473900, 942852920590, 2306978778432 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 5 of A237234
LINKS
FORMULA
Empirical: a(n) = 7*a(n-2) +10*a(n-4) +15*a(n-6) -314*a(n-8) -1389*a(n-10) +1365*a(n-12) +3415*a(n-14) +2472*a(n-16) +2424*a(n-18) +3384*a(n-20) -6192*a(n-22) +1152*a(n-24) -2304*a(n-26) for n>29
EXAMPLE
Some solutions for n=3
..1..2..1..1..2..0....2..1..0..0..2..2....1..2..2..0..0..2....1..0..1..2..0..1
..0..1..1..1..2..2....1..2..1..0..1..1....0..1..2..1..1..2....0..1..2..1..1..1
..1..1..1..0..1..2....0..1..2..1..1..1....1..0..1..1..1..2....2..1..1..0..1..1
..1..1..2..1..0..1....1..0..2..2..0..0....2..1..0..2..2..0....2..1..1..0..2..1
CROSSREFS
Sequence in context: A253520 A254418 A254425 * A031627 A252128 A237674
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 05 2014
STATUS
approved

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Last modified April 22 02:54 EDT 2024. Contains 371887 sequences. (Running on oeis4.)