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A236150 Number of (n+1)X(3+1) 0..2 arrays colored with the sets of distinct values in every 2X2 subblock 1
2148, 16128, 146568, 1351296, 12511728, 115757328, 1072589616, 9925448784, 91969145856, 851086457904, 7885964625216, 72978958778976, 676188542581680, 6257796438868368, 57980372654051280, 536592972297524208 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A236155

LINKS

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

FORMULA

Empirical: a(n) = 91*a(n-2) +17*a(n-3) -555*a(n-4) -199*a(n-5) -2759*a(n-6) -806*a(n-7) +12016*a(n-8) +8767*a(n-9) +37038*a(n-10) +23107*a(n-11) -30178*a(n-12) -50102*a(n-13) -64316*a(n-14) -22746*a(n-15) -28056*a(n-16) +29816*a(n-17) -137392*a(n-18) -67760*a(n-19) -1568*a(n-20) -11584*a(n-21) +3392*a(n-22) -192*a(n-23) for n>26

EXAMPLE

Some solutions for n=3

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

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

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

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

CROSSREFS

Sequence in context: A291135 A251852 A251846 * A252126 A192771 A152963

Adjacent sequences: A236147 A236148 A236149 * A236151 A236152 A236153

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 19 2014

STATUS

approved

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Last modified February 3 04:05 EST 2023. Contains 360024 sequences. (Running on oeis4.)