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A237008 Number of (n+1)X(1+1) 0..3 arrays with the sum of all four elements of every 2X2 subblock equal 1
256, 704, 1936, 5984, 18496, 61472, 204304, 712352, 2483776, 8957984, 32307856, 119454944, 441672256, 1663878752, 6268205584, 23952380192, 91528031296, 353581084064, 1365915788176, 5320845079904, 20727040868416, 81257847595232 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 1 of A237015

LINKS

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

FORMULA

Empirical: a(n) = 8*a(n-1) +16*a(n-2) -268*a(n-3) +189*a(n-4) +3388*a(n-5) -5824*a(n-6) -20048*a(n-7) +49756*a(n-8) +52752*a(n-9) -196896*a(n-10) -24192*a(n-11) +369216*a(n-12) -131328*a(n-13) -262656*a(n-14) +165888*a(n-15)

EXAMPLE

Some solutions for n=5

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

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

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

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

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

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

CROSSREFS

Sequence in context: A086061 A235092 A237015 * A045057 A195091 A203450

Adjacent sequences:  A237005 A237006 A237007 * A237009 A237010 A237011

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 02 2014

STATUS

approved

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Last modified August 12 12:05 EDT 2022. Contains 356072 sequences. (Running on oeis4.)