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A198718 Number of nX3 0..6 arrays with values 0..6 introduced in row major order and no element equal to any horizontal or vertical neighbor 2
2, 34, 2027, 232841, 34003792, 5315840795, 846047363854, 135284283124811, 21658679381667910, 3468618095206638077, 555543217744635684040, 88979288917879960297469, 14251565534424509235823960 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 3 of A198723
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..200
FORMULA
Empirical: a(n) = 234*a(n-1) -13497*a(n-2) +283640*a(n-3) -2626919*a(n-4) +12277210*a(n-5) -30282843*a(n-6) +38629620*a(n-7) -23115780*a(n-8) +4848336*a(n-9)
EXAMPLE
Some solutions with all values 0 to 6 for n=4
..0..1..2....0..1..2....0..1..2....0..1..2....0..1..2....0..1..0....0..1..2
..3..0..4....3..0..3....3..4..3....3..2..0....3..4..5....2..3..4....3..4..5
..5..3..5....4..5..2....4..5..6....4..5..3....5..6..4....1..0..5....4..6..4
..2..6..2....2..0..6....5..1..5....1..6..0....0..5..1....6..2..4....3..4..6
CROSSREFS
Sequence in context: A291903 A340863 A198977 * A198909 A207865 A216082
Adjacent sequences: A198715 A198716 A198717 * A198719 A198720 A198721
KEYWORD
nonn
AUTHOR
R. H. Hardin Oct 29 2011
STATUS
approved

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Last modified August 31 15:32 EDT 2024. Contains 375572 sequences. (Running on oeis4.)