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A237724 Number of (n+1)X(2+1) 0..2 arrays with the maximum plus the upper median minus the lower median of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one 1
348, 2152, 13496, 86010, 542946, 3412698, 21521906, 136316506, 860711592, 5425536832, 34247218680, 216455290804, 1366639826320, 8623564298254, 54443929896190, 343862067605274, 2171012674382328, 13704252654063820 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A237730

LINKS

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

FORMULA

Empirical: a(n) = 66*a(n-3) +903*a(n-4) +1628*a(n-5) +4020*a(n-6) -3173*a(n-7) -98477*a(n-8) -153617*a(n-9) +15724*a(n-10) +83098*a(n-11) +20571*a(n-12) +3764*a(n-13) +88351*a(n-14) +8583*a(n-15) -32804*a(n-16) +10471*a(n-17) -15241*a(n-18) -3432*a(n-19) +809*a(n-20) -2856*a(n-21) +1062*a(n-22) for n>24

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Sequence in context: A304837 A231089 A237318 * A054467 A230705 A230616

Adjacent sequences:  A237721 A237722 A237723 * A237725 A237726 A237727

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 12 2014

STATUS

approved

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Last modified August 12 10:16 EDT 2022. Contains 356069 sequences. (Running on oeis4.)