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A146999 Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 00100-00100-11111 pattern in any orientation. 0

%I

%S 1,1,1,1,1,1,2,3,5,7,13,19,53,121,389,940,3064,7695,29728,97515,

%T 493327,1920641,10778992,46183271,290012194,1476840183,11445253811

%N Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 00100-00100-11111 pattern in any orientation.

%e Maximal 8 X 8 example

%e .0.0.1.1.1.1.1.0

%e .0.0.0.0.1.0.0.1

%e .1.0.0.0.1.0.0.1

%e .1.0.0.0.0.1.1.1

%e .1.1.1.0.0.0.0.1

%e .1.0.0.1.0.0.0.1

%e .1.0.0.1.0.0.0.0

%e .0.1.1.1.1.1.0.0

%K nonn

%O 1,7

%A _R. H. Hardin_, Nov 04 2008

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Last modified January 16 02:06 EST 2022. Contains 350374 sequences. (Running on oeis4.)