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A237918 Number of (n+1)X(4+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
63476, 1282504, 27873820, 636891488, 14163256928, 319272033708, 7170378195892, 161382511774196, 3629106051378200, 81717484559463064, 1838421822041726832, 41385101785859636936, 931379102458488697656, 20967387870826434629524 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A237921

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..100

EXAMPLE

Some solutions for n=1

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

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

CROSSREFS

Sequence in context: A115748 A226003 A203921 * A294147 A242142 A117282

Adjacent sequences:  A237915 A237916 A237917 * A237919 A237920 A237921

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 15 2014

STATUS

approved

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Last modified July 2 10:39 EDT 2022. Contains 355004 sequences. (Running on oeis4.)