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A205309 Number of n X 7 0..3 arrays with no occurrence of three equal elements in a row horizontally or vertically, and new values 0..3 introduced in row major order. 0

%I #6 Jun 06 2018 15:40:31

%S 528,6427791,50933680120,442834241887042,3775750320744043966,

%T 32325164995795813807941

%N Number of n X 7 0..3 arrays with no occurrence of three equal elements in a row horizontally or vertically, and new values 0..3 introduced in row major order.

%e Some solutions for n=5

%e ..0..0..1..0..0..1..1....0..1..2..2..1..0..0....0..1..1..0..0..2..3

%e ..2..1..0..1..3..1..3....3..0..0..1..1..2..3....3..0..0..2..1..3..2

%e ..3..1..1..3..0..2..0....3..3..2..0..0..2..1....0..1..0..2..0..1..2

%e ..0..2..0..0..1..1..3....1..3..1..0..0..1..0....1..3..1..0..1..3..3

%e ..3..0..3..1..1..3..2....2..0..2..1..1..0..3....2..0..2..2..1..1..0

%Y Column 7 of A205310.

%K nonn

%O 1,1

%A _R. H. Hardin_, Jan 25 2012

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Last modified March 28 10:31 EDT 2024. Contains 371240 sequences. (Running on oeis4.)