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A207490 Number of 5Xn 0..1 arrays avoiding 0 0 0 and 0 1 1 horizontally and 0 1 1 and 1 1 0 vertically 1
14, 196, 408, 1459, 4041, 8808, 21991, 48044, 105558, 230156, 490287, 1049299, 2221620, 4710903, 9955616, 21033770, 44465838, 93802765, 198306079, 418690364, 884240221, 1869141068, 3946519000, 8342005680, 17626630049, 37237956591 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 5 of A207488

LINKS

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

FORMULA

Empirical: a(n) = a(n-1) +5*a(n-2) +9*a(n-3) -24*a(n-4) -39*a(n-5) -30*a(n-6) +138*a(n-7) +174*a(n-8) +93*a(n-9) -491*a(n-10) -626*a(n-11) -220*a(n-12) +1436*a(n-13) +1645*a(n-14) +53*a(n-15) -3311*a(n-16) -2794*a(n-17) +1013*a(n-18) +5466*a(n-19) +3055*a(n-20) -2604*a(n-21) -6394*a(n-22) -2236*a(n-23) +3343*a(n-24) +5400*a(n-25) +1218*a(n-26) -2618*a(n-27) -3363*a(n-28) -623*a(n-29) +1314*a(n-30) +1559*a(n-31) +321*a(n-32) -425*a(n-33) -525*a(n-34) -124*a(n-35) +88*a(n-36) +119*a(n-37) +26*a(n-38) -12*a(n-39) -16*a(n-40) -2*a(n-41) +a(n-42) +a(n-43)

EXAMPLE

Some solutions for n=4

..0..1..0..0....0..1..0..1....1..1..0..1....1..0..0..1....0..1..0..1

..0..0..1..0....1..0..1..0....0..1..0..1....1..1..1..0....0..0..1..0

..0..1..0..1....0..1..0..0....1..1..0..1....1..0..0..1....1..0..0..1

..0..0..1..0....0..0..1..0....0..1..0..1....1..0..1..0....0..1..0..0

..1..1..0..1....0..1..0..0....1..1..0..1....1..0..0..1....1..0..0..1

CROSSREFS

Sequence in context: A208383 A208110 A208842 * A207887 A207775 A207663

Adjacent sequences:  A207487 A207488 A207489 * A207491 A207492 A207493

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 18 2012

STATUS

approved

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Last modified November 29 18:22 EST 2021. Contains 349416 sequences. (Running on oeis4.)