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A185768 Number of (n+1)X9 binary arrays with no 2X2 subblock trace equal to any horizontal or vertical neighbor 2X2 subblock trace 1
11400, 99464, 1071200, 12760448, 166155112, 2212654240, 29857704328, 404009799752, 5470539659856, 74057459086320, 1002612561951160, 13573903623389016, 183767715146185232, 2487947552529036000 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 8 of A185769

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..200

FORMULA

Empirical: a(n)=a(n-1)+179*a(n-2)+341*a(n-3)-6316*a(n-4)-6138*a(n-5)+92272*a(n-6)-87872*a(n-7)-479803*a(n-8)+1815915*a(n-9)-852208*a(n-10)-6873004*a(n-11)+8175787*a(n-12)+6036792*a(n-13)-5492010*a(n-14)-12389568*a(n-15)+3504328*a(n-16)+38808492*a(n-17)-4735254*a(n-18)-36745560*a(n-19)-36433267*a(n-20)+12744011*a(n-21)+28480781*a(n-22)+9986028*a(n-23)-2174189*a(n-24)-3904760*a(n-25)-845298*a(n-26)-118044*a(n-27)-60864*a(n-28)-3296*a(n-29)-32*a(n-30) for n>36

EXAMPLE

Some solutions for 3X9

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

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

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

CROSSREFS

Sequence in context: A236983 A268841 A235016 * A082440 A083975 A157655

Adjacent sequences:  A185765 A185766 A185767 * A185769 A185770 A185771

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 03 2011

STATUS

approved

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Last modified May 25 22:51 EDT 2022. Contains 354073 sequences. (Running on oeis4.)