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A181254
Number of (n+2) X (n+2) binary matrices with every 3 X 3 block having exactly four 1's.
0
126, 746, 3190, 10818, 41374, 133850, 386406, 1297322, 3873790, 10724850
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OFFSET
1,1
LINKS
Table of n, a(n) for n=1..10.
EXAMPLE
Some solutions for 4 X 4:
1 1 0 1 1 0 0 0 1 1 1 1 0 0 1 1 1 0 0 0
1 0 0 0 0 0 1 0 0 0 1 0 1 0 0 1 1 0 1 1
0 1 0 1 0 1 1 1 0 0 0 0 1 0 1 0 0 1 0 1
1 0 1 1 1 0 0 0 1 1 1 1 0 0 1 1 1 0 0 0
CROSSREFS
Diagonal of
A181262
.
Sequence in context:
A186825
A186817
A107658
*
A004008
A292981
A126170
Adjacent sequences:
A181251
A181252
A181253
*
A181255
A181256
A181257
KEYWORD
nonn
AUTHOR
R. H. Hardin
, Oct 10 2010
STATUS
approved
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Last modified August 31 22:14 EDT 2024. Contains 375574 sequences. (Running on oeis4.)