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A238924 Number of (n+1)X(2+1) 0..3 arrays with no element greater than all horizontal neighbors or equal to all vertical neighbors 1
116, 864, 13456, 176224, 2391340, 32225410, 434883190, 5866480970, 79148026266, 1067794388852, 14405743947640, 194350331031622, 2622009798414430, 35373925800422336, 477235079297688562, 6438451123696482358 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A238929

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..201

FORMULA

Empirical: a(n) = -a(n-1) +65*a(n-2) +1098*a(n-3) +6738*a(n-4) +26484*a(n-5) +45809*a(n-6) -10891*a(n-7) -263008*a(n-8) -387302*a(n-9) +562267*a(n-10) +230623*a(n-11) +750744*a(n-12) -1386458*a(n-13) -137951*a(n-14) +2418439*a(n-15) -3558590*a(n-16) +4571814*a(n-17) -8784507*a(n-18) +12140213*a(n-19) -12163114*a(n-20) +11817304*a(n-21) -12288249*a(n-22) +11895067*a(n-23) -8961637*a(n-24) +5972681*a(n-25) -4308120*a(n-26) +2902293*a(n-27) -1401870*a(n-28) +315180*a(n-29)

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Sequence in context: A096925 A097231 A203251 * A076044 A241941 A202903

Adjacent sequences:  A238921 A238922 A238923 * A238925 A238926 A238927

KEYWORD

nonn

AUTHOR

R. H. Hardin, Mar 07 2014

STATUS

approved

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Last modified May 26 18:08 EDT 2020. Contains 334630 sequences. (Running on oeis4.)