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A251404 Number of (n+1)X(2+1) 0..2 arrays with every 2X2 subblock summing to a prime 1
238, 2164, 19654, 179400, 1634286, 14919346, 136033976, 1241601558, 11324851298, 103347731602, 942800497790, 8602989816444, 78487649036798, 716159657613444, 6533986460840950, 59617758968511628, 543941703260044888 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A251410

LINKS

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

FORMULA

Empirical: a(n) = 8*a(n-1) +60*a(n-2) -452*a(n-3) -649*a(n-4) +5937*a(n-5) +916*a(n-6) -23417*a(n-7) +4582*a(n-8) +26384*a(n-9) -7348*a(n-10) -1208*a(n-11) +48*a(n-12)

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Sequence in context: A252905 A122266 A286213 * A238602 A279274 A282812

Adjacent sequences:  A251401 A251402 A251403 * A251405 A251406 A251407

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 02 2014

STATUS

approved

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Last modified March 30 06:59 EDT 2020. Contains 333119 sequences. (Running on oeis4.)