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A237571 Number of (n+1)X(3+1) 0..3 arrays with the upper median minus the lower median of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one 2
13924, 315664, 7379204, 173478980, 4093774632, 95639726868, 2255748816966, 52746091216472, 1244121688354740, 29088796774026344, 686098112079186338, 16041540535482336896, 378367591142818627910, 8846617965689182153740 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A237574

LINKS

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

EXAMPLE

Some solutions for n=1

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

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

CROSSREFS

Sequence in context: A190817 A298428 A252557 * A244273 A118464 A031666

Adjacent sequences:  A237568 A237569 A237570 * A237572 A237573 A237574

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 09 2014

STATUS

approved

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Last modified September 26 23:44 EDT 2022. Contains 357051 sequences. (Running on oeis4.)