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A237407 Number of (n+1) X (3+1) 0..2 arrays with the maximum plus the upper median plus the minimum of every 2 X 2 subblock differing from its horizontal and vertical neighbors by exactly one. 1
1278, 8236, 53167, 373804, 2671962, 18401364, 125750824, 872440876, 6089994150, 42113161848, 291069201134, 2016256423968, 14003302227390, 96905004811952, 671377683662330, 4648755970028064, 32248931393362930, 223222561428051576 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A237412.

LINKS

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

EXAMPLE

Some solutions for n=3

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

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

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

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

CROSSREFS

Sequence in context: A210365 A190831 A202643 * A251097 A031798 A293923

Adjacent sequences:  A237404 A237405 A237406 * A237408 A237409 A237410

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 07 2014

STATUS

approved

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Last modified June 22 21:29 EDT 2021. Contains 345393 sequences. (Running on oeis4.)