A237504 - OEIS

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A237504

Number of (n+1)X(1+1) 0..2 arrays with the maximum plus the upper median minus the minimum of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one

81, 328, 1342, 5622, 23545, 97700, 406008, 1690160, 7044600, 29290848, 121938192, 507239832, 2112696916, 8786861808, 36590339088, 152192510432, 633818640688, 2636209092480, 10978287344480, 45661928555744, 190158818087504

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

Column 1 of A237511

LINKS

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

FORMULA

Empirical: a(n) = 208*a(n-4) +1448*a(n-6) +2500*a(n-8) +528*a(n-10) -624*a(n-12)

EXAMPLE

Some solutions for n=5

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

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

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

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

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

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

CROSSREFS

Sequence in context: A236828 A236821 A237511 * A222162 A237481 A237474

Adjacent sequences: A237501 A237502 A237503 * A237505 A237506 A237507

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 08 2014

STATUS

approved