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A236878 Number of (n+1)X(2+1) 0..2 arrays with the maximum plus the upper median plus the lower median of every 2X2 subblock equal 1
211, 669, 2111, 7995, 29673, 117703, 462885, 1868937, 7534429, 30744153, 125576911, 516317755, 2126269431, 8792513827, 36414484091, 151240645827, 628964493529, 2621050705595, 10934020192599, 45682050849053 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A236884

LINKS

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

FORMULA

Empirical: a(n) = 14*a(n-1) -28*a(n-2) -459*a(n-3) +2258*a(n-4) +4418*a(n-5) -46337*a(n-6) +15855*a(n-7) +478245*a(n-8) -699780*a(n-9) -2810786*a(n-10) +6844631*a(n-11) +9089948*a(n-12) -36536014*a(n-13) -9754145*a(n-14) +120336673*a(n-15) -40121314*a(n-16) -248844918*a(n-17) +191784528*a(n-18) +308729988*a(n-19) -375062032*a(n-20) -194512520*a(n-21) +397632272*a(n-22) +14941536*a(n-23) -230210592*a(n-24) +50723072*a(n-25) +68301056*a(n-26) -26409216*a(n-27) -8429056*a(n-28) +4614144*a(n-29) +122880*a(n-30) -184320*a(n-31)

EXAMPLE

Some solutions for n=5

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

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

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

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

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

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

CROSSREFS

Sequence in context: A056212 A299110 A236722 * A137770 A142761 A308798

Adjacent sequences:  A236875 A236876 A236877 * A236879 A236880 A236881

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 01 2014

STATUS

approved

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Last modified July 11 23:53 EDT 2020. Contains 335654 sequences. (Running on oeis4.)