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A237012 Number of (n+1)X(5+1) 0..3 arrays with the sum of all four elements of every 2X2 subblock equal 1
18496, 30248, 53200, 108824, 235456, 566936, 1419088, 3823352, 10606336, 31051928, 93101200, 291198584, 929945536, 3075627416, 10363357648, 35959849592, 126791656576, 457860358808, 1674516989200, 6238192077944 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 5 of A237015

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..68

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=4

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

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

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

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

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

CROSSREFS

Sequence in context: A157738 A247205 A173274 * A031817 A236816 A229076

Adjacent sequences:  A237009 A237010 A237011 * A237013 A237014 A237015

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 02 2014

STATUS

approved

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Last modified January 24 13:48 EST 2022. Contains 350538 sequences. (Running on oeis4.)