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A255145 Number of (n+2)X(4+2) 0..1 arrays with no 3x3 subblock diagonal sum 0 and no antidiagonal sum 0 and no row sum 1 and no column sum 1 1

%I #4 Feb 15 2015 09:35:26

%S 784,4576,29731,190731,1241971,8173810,53762469,353508918,2326278688,

%T 15311112333,100764625099,663153932703,4364538269828,28725088912609,

%U 189051972965420,1244235148878152,8188881476050733,53894720638538655

%N Number of (n+2)X(4+2) 0..1 arrays with no 3x3 subblock diagonal sum 0 and no antidiagonal sum 0 and no row sum 1 and no column sum 1

%C Column 4 of A255149

%H R. H. Hardin, <a href="/A255145/b255145.txt">Table of n, a(n) for n = 1..210</a>

%H R. H. Hardin, <a href="/A255145/a255145.txt">Empirical recurrence of order 76</a>

%F Empirical recurrence of order 76 (see link above)

%e Some solutions for n=4

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

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

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

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

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

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

%Y Cf. A255149

%K nonn

%O 1,1

%A _R. H. Hardin_, Feb 15 2015

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Last modified May 7 20:13 EDT 2024. Contains 372317 sequences. (Running on oeis4.)