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A280960 Number of nX7 0..2 arrays with no element equal to more than one of its horizontal, vertical and antidiagonal neighbors and with new values introduced in order 0 sequentially upwards. 1

%I #4 Jan 11 2017 15:16:55

%S 224,23593,402077,9986376,251270618,6052621154,148137367471,

%T 3624578433814,88500510514256,2162800206884214,52848406746190667,

%U 1291317121466531838,31553229218022226192,770996700142671487457

%N Number of nX7 0..2 arrays with no element equal to more than one of its horizontal, vertical and antidiagonal neighbors and with new values introduced in order 0 sequentially upwards.

%C Column 7 of A280961.

%H R. H. Hardin, <a href="/A280960/b280960.txt">Table of n, a(n) for n = 1..62</a>

%e Some solutions for n=2

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

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

%Y Cf. A280961.

%K nonn

%O 1,1

%A _R. H. Hardin_, Jan 11 2017

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Last modified April 22 06:04 EDT 2024. Contains 371887 sequences. (Running on oeis4.)