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A251468 Number of (n+1)X(1+1) 0..5 arrays with every 2X2 subblock summing to a prime 1
458, 5896, 75962, 979132, 12620130, 162672044, 2096768998, 27026993956, 348367738690, 4490393194956, 57879565086886, 746055829050468, 9616401051712082, 123953375651230956, 1597717011719440470 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 1 of A251474

LINKS

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

FORMULA

Empirical: a(n) = 2*a(n-1) +227*a(n-2) -338*a(n-3) -12532*a(n-4) +15916*a(n-5) +236364*a(n-6) -266424*a(n-7) -1149984*a(n-8) +1209600*a(n-9) +414720*a(n-10)

EXAMPLE

Some solutions for n=3

..2..5....1..5....1..5....4..5....4..1....4..5....4..2....1..5....4..5....1..1

..3..1....3..4....0..5....3..5....1..1....3..5....1..4....1..4....5..3....1..4

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

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

CROSSREFS

Sequence in context: A252407 A252408 A251474 * A098765 A286845 A062043

Adjacent sequences:  A251465 A251466 A251467 * A251469 A251470 A251471

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 02 2014

STATUS

approved

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Last modified October 25 19:43 EDT 2021. Contains 348255 sequences. (Running on oeis4.)