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A232519 Number of (4+1)X(n+1) 0..2 arrays with every element next to itself plus and minus one within the range 0..2 horizontally, diagonally or antidiagonally, with no adjacent elements equal 1
16, 784, 400, 19138, 10118, 475086, 270400, 11784356, 7140010, 292330336, 188043058, 7252216630, 4934734294, 179925026928, 129109909224, 4464133177230, 3368749724012, 110766190099038, 87681691291582, 2748538208103026 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 4 of A232515

LINKS

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

FORMULA

Empirical: a(n) = a(n-1) +22*a(n-2) -20*a(n-3) +77*a(n-4) -95*a(n-5) -213*a(n-6) +34*a(n-7) -308*a(n-8) +324*a(n-9) +783*a(n-10) -62*a(n-11) +308*a(n-12) -271*a(n-13) -1055*a(n-14) +343*a(n-15) +626*a(n-16) -53*a(n-17) -137*a(n-18) +5*a(n-19) +48*a(n-20) -84*a(n-21) -36*a(n-22) +36*a(n-23)

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Sequence in context: A194610 A215171 A224736 * A231083 A173984 A186855

Adjacent sequences:  A232516 A232517 A232518 * A232520 A232521 A232522

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 25 2013

STATUS

approved

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Last modified September 28 10:48 EDT 2021. Contains 347714 sequences. (Running on oeis4.)