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A255619 Number of length n+5 0..2 arrays with at most two downsteps in every 5 consecutive neighbor pairs 1
651, 1803, 5088, 14381, 40659, 114546, 322078, 907110, 2556858, 7205734, 20304363, 57202476, 161153983, 454067388, 1279391559, 3604760378, 10156531428, 28616171577, 80626959391, 227170254438, 640061685474, 1803397934760 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 5 of A255622

LINKS

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

FORMULA

Empirical: a(n) = 3*a(n-1) -3*a(n-2) +8*a(n-3) -9*a(n-4) +30*a(n-5) -35*a(n-6) +12*a(n-7) -45*a(n-8) +56*a(n-9) -147*a(n-10) +177*a(n-11) -63*a(n-12) +18*a(n-13) +3*a(n-14)

EXAMPLE

Some solutions for n=4

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

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

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

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

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

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

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

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

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

CROSSREFS

Cf. A255622

Sequence in context: A110836 A252388 A043605 * A151736 A346138 A010087

Adjacent sequences:  A255616 A255617 A255618 * A255620 A255621 A255622

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 28 2015

STATUS

approved

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Last modified January 21 23:58 EST 2022. Contains 350481 sequences. (Running on oeis4.)