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A251406 Number of (n+1) X (4+1) 0..2 arrays with every 2 X 2 subblock summing to a prime. 1

%I #6 May 20 2021 14:27:38

%S 6370,179400,5037428,143030000,4043668176,114835717382,3252989390702,

%T 92341232223276,2617741318438868,74284772047478820,

%U 2106558254168554944,59767693725080887006,1695146990015398218996,48090347842888885619618

%N Number of (n+1) X (4+1) 0..2 arrays with every 2 X 2 subblock summing to a prime.

%C Column 4 of A251410.

%H R. H. Hardin, <a href="/A251406/b251406.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=2

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

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

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

%Y Cf. A251410.

%K nonn

%O 1,1

%A _R. H. Hardin_, Dec 02 2014

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Last modified April 19 19:02 EDT 2024. Contains 371798 sequences. (Running on oeis4.)