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A237916 Number of (n+1)X(2+1) 0..3 arrays with the upper median plus the lower median of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one 1
1584, 14564, 133528, 1282504, 12149024, 115206520, 1092851528, 10375258140, 98442896216, 934214824740, 8864965437532, 84126729220500, 798309064976816, 7575648390881364, 71889164102413344, 682196900350785372 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A237921

LINKS

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

R. H. Hardin, Empirical recurrence of order 56

FORMULA

Empirical recurrence of order 56 (see link above)

EXAMPLE

Some solutions for n=3

..0..2..0....2..0..3....1..2..2....2..2..0....0..3..1....2..1..0....1..0..0

..2..3..1....1..1..2....2..0..2....1..1..1....1..0..1....2..1..2....1..2..1

..1..3..1....2..2..3....2..3..1....3..0..0....1..3..2....2..3..1....2..0..1

..2..2..0....3..0..1....3..2..2....1..0..1....1..2..2....0..1..0....3..0..2

CROSSREFS

Sequence in context: A224945 A306313 A053170 * A159211 A235844 A277766

Adjacent sequences:  A237913 A237914 A237915 * A237917 A237918 A237919

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 15 2014

STATUS

approved

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Last modified August 12 21:52 EDT 2022. Contains 356077 sequences. (Running on oeis4.)