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A202891 Number of (n+2)X3 binary arrays avoiding patterns 001 and 010 in rows, columns and nw-to-se diagonals. 1
96, 258, 776, 2201, 6037, 16722, 46270, 127161, 349088, 958698, 2630889, 7215860, 19790631, 54276884, 148842778, 408154085, 1119230330, 3069096344, 8415836728, 23077199603, 63280320762, 173521625446, 475815066492, 1304736247929 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
FORMULA
Empirical: a(n) = 3*a(n-1) -3*a(n-2) +14*a(n-3) -20*a(n-4) +9*a(n-5) -47*a(n-6) +24*a(n-7) +14*a(n-8) +62*a(n-9) +24*a(n-10) -33*a(n-11) -52*a(n-12) -43*a(n-13) +4*a(n-14) +25*a(n-15) +20*a(n-16) +5*a(n-17) -2*a(n-18) -3*a(n-19).
EXAMPLE
Some solutions for n=3
..1..1..1....0..1..1....0..1..1....1..1..1....1..0..1....1..0..1....0..1..1
..1..1..1....1..1..0....1..1..1....1..1..1....1..0..0....0..1..1....1..1..1
..1..1..1....1..0..1....1..1..1....0..1..1....0..0..0....0..1..1....1..1..1
..1..1..0....1..1..1....1..1..1....1..0..0....1..0..0....0..1..1....0..0..0
..1..0..0....1..1..1....1..0..0....1..1..0....1..0..0....0..1..1....0..0..0
CROSSREFS
Column 1 of A202898.
Sequence in context: A304510 A268771 A202898 * A232939 A202591 A202584
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 25 2011
STATUS
approved

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Last modified February 28 15:18 EST 2024. Contains 370400 sequences. (Running on oeis4.)