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A232592 Number of (3+1)X(n+1) 0..2 arrays with every element next to itself plus and minus one within the range 0..2 horizontally or antidiagonally, with no adjacent elements equal 1
4, 124, 42, 996, 606, 8104, 7568, 66744, 82132, 556612, 836046, 4691760, 8187072, 39925804, 78178630, 342580066, 733698936, 2960354254, 6801151306, 25734466516, 62477896160, 224824244852, 570101087316, 1972190659984, 5175766221764 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 3 of A232589

LINKS

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

FORMULA

Empirical: a(n) = 10*a(n-2) +8*a(n-3) -16*a(n-4) -56*a(n-5) -27*a(n-6) +64*a(n-7) +154*a(n-8) +50*a(n-9) -123*a(n-10) -248*a(n-11) -60*a(n-12) +168*a(n-13) +246*a(n-14) +40*a(n-15) -138*a(n-16) -128*a(n-17) -27*a(n-18) +40*a(n-19) +30*a(n-20) +14*a(n-21) +a(n-22) -a(n-24) for n>26

EXAMPLE

Some solutions for n=7

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

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

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

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

CROSSREFS

Sequence in context: A064681 A219871 A263550 * A005936 A241648 A197779

Adjacent sequences:  A232589 A232590 A232591 * A232593 A232594 A232595

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 26 2013

STATUS

approved

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Last modified May 22 11:58 EDT 2022. Contains 353949 sequences. (Running on oeis4.)