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A252267 Number of (n+2) X (6+2) 0..3 arrays with every 3 X 3 subblock row, column, diagonal and antidiagonal sum not equal to 2 3 4 6 or 7. 1

%I #6 May 03 2021 15:08:03

%S 2900,17008,122506,800946,5217924,34351677,225314758,1478226653,

%T 9717153148,63795462094,418649646607,2748809210377,18049979171913,

%U 118504214119528,778005088796521,5108005033209650,33536938748132854

%N Number of (n+2) X (6+2) 0..3 arrays with every 3 X 3 subblock row, column, diagonal and antidiagonal sum not equal to 2 3 4 6 or 7.

%C Column 6 of A252269.

%H R. H. Hardin, <a href="/A252267/b252267.txt">Table of n, a(n) for n = 1..210</a>

%H R. H. Hardin, <a href="/A252267/a252267.txt">Empirical recurrence of order 71</a>

%F Empirical recurrence of order 71 (see link above).

%e Some solutions for n=3

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

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

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

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

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

%Y Cf. A252269.

%K nonn

%O 1,1

%A _R. H. Hardin_, Dec 16 2014

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Last modified April 24 20:08 EDT 2024. Contains 371963 sequences. (Running on oeis4.)