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A238930 Number of (1+1)X(n+1) 0..3 arrays with no element greater than all horizontal neighbors or equal to all vertical neighbors 1
12, 116, 782, 5008, 34302, 238418, 1646042, 11326068, 77968882, 537049414, 3699270740, 25478998834, 175485675518, 1208662819246, 8324733430626, 57337025095172, 394911401135220, 2719970490375902, 18733924179432448 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 1 of A238929

LINKS

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

FORMULA

Empirical: a(n) = 6*a(n-1) -a(n-2) +39*a(n-3) +58*a(n-4) +84*a(n-5) -27*a(n-6) -224*a(n-7) -281*a(n-8) -40*a(n-9) +129*a(n-10) +229*a(n-11) +137*a(n-12) -191*a(n-13) -61*a(n-14) +61*a(n-15) +3*a(n-16) -7*a(n-17) +a(n-18)

EXAMPLE

Some solutions for n=5

..2..3..3..1..3..3....0..1..1..0..1..1....2..2..1..1..2..2....1..1..0..3..3..2

..1..2..2..2..2..2....2..2..2..1..2..2....3..3..2..3..3..1....0..0..2..2..2..1

CROSSREFS

Sequence in context: A238929 A166777 A027285 * A304827 A182671 A154346

Adjacent sequences:  A238927 A238928 A238929 * A238931 A238932 A238933

KEYWORD

nonn

AUTHOR

R. H. Hardin, Mar 07 2014

STATUS

approved

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Last modified September 24 15:40 EDT 2021. Contains 347643 sequences. (Running on oeis4.)