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A185465 Number of (n+1)X8 binary arrays with no 2X2 subblock determinant equal to any horizontal or vertical neighbor 2X2 subblock determinant 0
3238, 11050, 83688, 798330, 7232746, 63886624, 560051658, 4901493530, 42904166068, 375457091278, 3285540131514, 28751276604382, 251598464967290, 2201709004230846, 19266907710955830, 168602478680601948 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A185467

LINKS

Table of n, a(n) for n=1..16.

FORMULA

Empirical: a(n)=5*a(n-1)+15*a(n-2)+110*a(n-3)+219*a(n-4)+1139*a(n-5)+3106*a(n-6)+6741*a(n-7)+13370*a(n-8)+10913*a(n-9)+33532*a(n-10)-178405*a(n-11)-186527*a(n-12)-61094*a(n-13)+667105*a(n-14)+735729*a(n-15)-179902*a(n-16)-675888*a(n-17)-604129*a(n-18)+162873*a(n-19)+143017*a(n-20)-75725*a(n-21)+29933*a(n-22)+200849*a(n-23)+202206*a(n-24)-116380*a(n-25)-9910*a(n-26)+126750*a(n-27)-395*a(n-28)-69584*a(n-29)-60132*a(n-30)+15461*a(n-31)+15565*a(n-32)-8192*a(n-33)-2114*a(n-34)-296*a(n-35)+2516*a(n-36)+806*a(n-37)+22*a(n-38)+8*a(n-39)+8*a(n-40) for n>46

EXAMPLE

Some solutions for 3X8

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

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

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

CROSSREFS

Sequence in context: A283578 A231141 A252611 * A254974 A118212 A233750

Adjacent sequences:  A185462 A185463 A185464 * A185466 A185467 A185468

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 28 2011

STATUS

approved

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Last modified October 26 21:33 EDT 2021. Contains 348269 sequences. (Running on oeis4.)