A251611 - OEIS

A251611

Number of (n+1) X (1+1) 0..6 arrays with every 2 X 2 subblock summing to a prime.

826, 14008, 237566, 4031056, 68377410, 1160228856, 19681119902, 333946195360, 5664841711778, 96119374080456, 1630518976897598, 27665962548009808, 469314413890815426, 7963074828849220248, 135083358869037010782

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OFFSET

1,1

COMMENTS

Column 1 of A251616.

LINKS

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

FORMULA

Empirical: a(n) = 2*a(n-1) +411*a(n-2) -674*a(n-3) -41804*a(n-4) +61984*a(n-5) +1400288*a(n-6) -1913856*a(n-7) -9522176*a(n-8) +11993088*a(n-9) +5898240*a(n-10).

EXAMPLE

Some solutions for n=2

..6..6....4..5....4..1....5..1....5..1....6..2....3..3....2..0....4..4....6..0

..1..0....6..4....4..2....6..5....6..1....3..6....6..1....1..4....3..0....1..6

..0..6....4..5....4..1....4..4....1..5....4..0....0..0....4..2....4..4....5..1

CROSSREFS

Cf. A251616.

Sequence in context: A051989 A237062 A251616 * A104375 A066946 A143799

Adjacent sequences: A251608 A251609 A251610 * A251612 A251613 A251614

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 05 2014

STATUS

approved