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A248995 Number of length n+4 0..2 arrays with no five consecutive terms having two times the sum of any three elements equal to three times the sum of the remaining two 2
190, 464, 1140, 2802, 6872, 16800, 41084, 100590, 246378, 603406, 1477382, 3616932, 8855718, 21683810, 53094696, 130003772, 318312974, 779389186, 1908348180, 4672636566, 11441043846, 28013571820, 68591653930, 167947819478 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A249001

LINKS

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

FORMULA

Empirical: a(n) = a(n-1) +2*a(n-2) +2*a(n-3) +2*a(n-4) +16*a(n-5) -3*a(n-6) -27*a(n-7) -36*a(n-8) -41*a(n-9) -73*a(n-10) -56*a(n-11) +40*a(n-12) +103*a(n-13) +182*a(n-14) +48*a(n-15) +102*a(n-16) +147*a(n-17) +128*a(n-18) -82*a(n-19) +74*a(n-20) +90*a(n-21) -137*a(n-22) -220*a(n-23) -204*a(n-24) -4*a(n-25) -152*a(n-26) -201*a(n-27) -183*a(n-28) +54*a(n-29) -37*a(n-30) -48*a(n-31) +a(n-32) -31*a(n-33) -10*a(n-34) -8*a(n-35) +24*a(n-36) +16*a(n-37)

EXAMPLE

Some solutions for n=6

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

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

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

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

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

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

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

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

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

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

CROSSREFS

Sequence in context: A333834 A051979 A097647 * A258725 A232387 A296521

Adjacent sequences:  A248992 A248993 A248994 * A248996 A248997 A248998

KEYWORD

nonn

AUTHOR

R. H. Hardin, Oct 18 2014

STATUS

approved

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Last modified July 31 05:28 EDT 2021. Contains 346367 sequences. (Running on oeis4.)