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A210160
Number of (n+1)X4 0..3 arrays with every 2X2 subblock having two or three distinct values, and new values 0..3 introduced in row major order
1
1977, 351482, 63734680, 11572169594, 2101304030788, 381562168006676, 69285421396766192, 12581094577437564692, 2284520145501218842460, 414831337889494109430366, 75326557848453481157022672
OFFSET
1,1
COMMENTS
Column 3 of A210165
LINKS
FORMULA
Empirical: a(n) = 172*a(n-1) +2086*a(n-2) -61767*a(n-3) -221678*a(n-4) +6709264*a(n-5) -21628195*a(n-6) -28904236*a(n-7) +171575402*a(n-8) +51603*a(n-9) -460002202*a(n-10) +137911776*a(n-11) +512783040*a(n-12) -179902696*a(n-13) -200966160*a(n-14) +54584192*a(n-15) -885504*a(n-16)
EXAMPLE
Some solutions for n=4
..0..0..0..1....0..0..1..0....0..0..0..0....0..1..0..0....0..0..0..0
..2..3..2..0....0..1..1..0....0..1..0..1....0..1..0..1....0..1..1..2
..1..2..1..1....0..0..0..1....0..1..1..0....1..0..1..0....1..0..1..3
..1..0..2..1....1..0..2..1....0..2..1..2....2..0..1..3....1..3..3..1
..3..3..2..2....1..1..0..0....3..3..1..3....2..2..1..1....1..3..0..1
CROSSREFS
Sequence in context: A205653 A206182 A205364 * A234179 A108510 A343971
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 18 2012
STATUS
approved