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A206516
Number of (n+1)X4 0..3 arrays with every 2X3 or 3X2 subblock having no more than four equal edges, and new values 0..3 introduced in row major order
1
2786, 695541, 177097738, 45142367398, 11507555684346, 2933481908580803, 747797195466172046, 190626930556386514119, 48594227014894390255783, 12387540901864509015493628, 3157806575432575464130353243
OFFSET
1,1
COMMENTS
Column 3 of A206521
LINKS
FORMULA
Empirical: a(n) = 238*a(n-1) +4150*a(n-2) +44332*a(n-3) -679650*a(n-4) -12043680*a(n-5) -129978174*a(n-6) -183422200*a(n-7) -661869709*a(n-8) +1822894708*a(n-9) +3929447237*a(n-10) +24688694694*a(n-11) +16930214447*a(n-12) +31521818926*a(n-13) -66759146931*a(n-14) +41508795870*a(n-15) -100230885135*a(n-16) +89003825784*a(n-17) -52703068122*a(n-18) +46958310468*a(n-19) -22966596792*a(n-20) +7564885488*a(n-21) -2550916800*a(n-22)
EXAMPLE
Some solutions for n=4
..0..0..0..0....0..0..0..0....0..0..0..0....0..0..1..0....0..0..0..0
..0..0..1..1....1..1..1..1....0..0..1..0....0..1..1..0....0..1..1..1
..1..2..0..2....2..1..2..3....2..0..1..0....0..0..0..1....0..0..0..1
..0..1..0..3....0..1..2..0....2..0..1..2....1..0..2..1....0..1..0..0
..2..2..1..2....0..1..3..0....1..3..0..0....1..1..0..3....0..1..1..1
CROSSREFS
Sequence in context: A236125 A251844 A237230 * A119377 A014895 A106300
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 08 2012
STATUS
approved