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A224618
Number of (n+4)X5 0..2 matrices with each 5X5 subblock idempotent.
1
54182, 20465, 23914, 32029, 39001, 43489, 54070, 79918, 122542, 187631, 273520, 383006, 535709, 762005, 1106184, 1626730, 2385788, 3471665, 5021971, 7252751, 10500500, 15253690, 22196507, 32295594, 46934366, 68138057, 98892534
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OFFSET
1,1
COMMENTS
Column 1 of
A224625
LINKS
R. H. Hardin,
Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 2*a(n-1) -a(n-2) +a(n-3) -2*a(n-4) +2*a(n-5) -a(n-7) -a(n-9) +a(n-10) -a(n-11) +a(n-12) for n>18
EXAMPLE
Some solutions for n=2
..0..0..0..0..0....0..0..0..0..0....0..0..0..0..0....1..2..0..1..0
..0..0..0..0..0....1..1..2..0..0....1..1..2..0..0....0..0..0..0..0
..0..0..0..0..0....0..0..0..0..0....0..0..0..0..0....0..1..1..2..0
..0..0..0..0..2....0..0..0..0..0....0..0..0..0..0....0..0..0..0..0
..0..0..0..0..1....0..0..0..0..0....0..0..0..0..0....0..0..0..0..0
..0..0..0..0..1....0..1..1..1..1....0..2..2..2..1....2..0..0..1..1
CROSSREFS
Sequence in context:
A202467
A224617
A224625
*
A254263
A254256
A254302
Adjacent sequences:
A224615
A224616
A224617
*
A224619
A224620
A224621
KEYWORD
nonn
AUTHOR
R. H. Hardin
, Apr 12 2013
STATUS
approved
