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A254776 Number of (2+2)X(n+2) 0..1 arrays with every 3X3 subblock sum of the two maximums of the central row and the central column and the two medians of the diagonal and antidiagonal nondecreasing horizontally, vertically and ne-to-sw antidiagonally 1

%I #6 Feb 07 2015 14:37:54

%S 2630,11321,50173,207006,876483,3931849,17766805,80755741,371133499,

%T 1709570292,7888129452,36437414874,168400742824,778428650323,

%U 3598875856069,16639899151437,76939511613102,355761482032982

%N Number of (2+2)X(n+2) 0..1 arrays with every 3X3 subblock sum of the two maximums of the central row and the central column and the two medians of the diagonal and antidiagonal nondecreasing horizontally, vertically and ne-to-sw antidiagonally

%C Row 2 of A254775

%H R. H. Hardin, <a href="/A254776/b254776.txt">Table of n, a(n) for n = 1..210</a>

%H R. H. Hardin, <a href="/A254776/a254776.txt">Empirical recurrence of order 75</a>

%F Empirical recurrence of order 75 (see link above)

%e Some solutions for n=3

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Feb 07 2015

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Last modified July 18 01:34 EDT 2024. Contains 374377 sequences. (Running on oeis4.)