A206235 - OEIS

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A206235

Number of (n+1)X6 0..3 arrays with every 2X3 or 3X2 subblock having exactly two equal edges, and new values 0..3 introduced in row major order

8910, 31652, 133392, 1236432, 10915392, 118573968, 1122086640, 10022726928, 109206613488, 1033441784400, 9230931489648, 100579291011408, 951799883421360, 8501687901954768, 92633527021495728, 876607692631061520

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

Column 5 of A206238

LINKS

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

FORMULA

Empirical: a(n) = a(n-1) +921*a(n-3) -921*a(n-4) for n>9

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Sequence in context: A037192 A236890 A326259 * A329799 A329468 A185321

Adjacent sequences: A206232 A206233 A206234 * A206236 A206237 A206238

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 05 2012

STATUS

approved