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A223380 Number of n X n 0..2 arrays with all horizontally or vertically connected equal values in a straight line, and new values 0..2 introduced in row major order. 0

%I #7 Jul 29 2019 16:38:39

%S 1,9,777,329840,684434305,6912575555900,339059747829716414,

%T 80685611230235666219160,93110832687595932573861629271

%N Number of n X n 0..2 arrays with all horizontally or vertically connected equal values in a straight line, and new values 0..2 introduced in row major order.

%e Some solutions for n=3

%e ..0..1..0....0..0..1....0..1..2....0..1..0....0..1..0....0..0..1....0..1..2

%e ..1..2..0....2..2..0....2..0..1....2..0..2....1..0..1....1..2..2....0..2..1

%e ..0..1..0....0..1..1....1..0..1....1..1..0....0..2..2....0..0..0....1..0..0

%Y Diagonal of A223387.

%K nonn

%O 1,2

%A _R. H. Hardin_, Mar 19 2013

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Last modified March 29 02:23 EDT 2024. Contains 371264 sequences. (Running on oeis4.)