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A242319 Number of length n+4+2 0..4 arrays with every value 0..4 appearing at least once in every consecutive 4+3 elements, and new values 0..4 introduced in order 1
140, 440, 1300, 3648, 10012, 27368, 75236, 208976, 577964, 1596216, 4408020, 12176768, 33645500, 92967176, 256849892, 709617776, 1960543660, 5416680632, 14965468916, 41347189280, 114235439996, 315613828040, 871989852740 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 4 of A242322
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = a(n-1) +2*a(n-2) +4*a(n-3) +6*a(n-4) +10*a(n-5) +12*a(n-6) -4*a(n-7) -6*a(n-8) -6*a(n-9) -2*a(n-11) -2*a(n-12) +a(n-14) +a(n-15)
EXAMPLE
Some solutions for n=5
..0....0....0....0....0....0....0....0....0....0....0....0....0....0....0....0
..1....1....1....1....1....1....1....0....1....1....1....0....0....1....1....1
..0....2....2....2....0....0....1....1....2....2....2....1....1....0....2....2
..2....1....2....3....2....2....2....2....3....2....0....2....2....2....0....0
..3....3....3....3....3....3....3....2....1....3....3....1....0....3....3....3
..2....0....4....0....4....0....4....3....4....4....4....3....3....2....4....1
..4....4....1....4....0....4....0....4....0....1....1....4....4....4....1....4
..3....1....0....2....0....1....2....0....3....0....0....2....1....1....2....0
..1....2....2....1....1....2....1....1....2....1....2....0....2....0....0....0
..0....2....0....4....2....0....2....2....1....2....3....4....2....0....1....2
..3....1....4....4....0....3....4....3....1....4....0....1....4....4....4....3
CROSSREFS
Sequence in context: A196447 A255783 A255776 * A010080 A350210 A250801
Adjacent sequences: A242316 A242317 A242318 * A242320 A242321 A242322
KEYWORD
nonn
AUTHOR
R. H. Hardin, May 10 2014
STATUS
approved

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Last modified August 18 11:16 EDT 2024. Contains 375265 sequences. (Running on oeis4.)