A224575 - OEIS

A224575

Number of (n+5) X 11 0..1 matrices with each 6 X 6 subblock idempotent.

25769, 7386, 7884, 8714, 9480, 10086, 10561, 12373, 15413, 19404, 24072, 29230, 34734, 41919, 52000, 65945, 84434, 107959, 136853, 172795, 218668, 278353, 356397, 457838, 588032, 754025, 965735, 1236991, 1586155, 2036626, 2617144, 3363506

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OFFSET

1,1

COMMENTS

Column 6 of A224577.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

FORMULA

Empirical: a(n) = 3*a(n-1) -3*a(n-2) +a(n-3) +2*a(n-6) -5*a(n-7) +4*a(n-8) -a(n-9) -a(n-12) +2*a(n-13) -a(n-14), for n>18.

EXAMPLE

Some solutions for n=2:

..1..1..1..1..1..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..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..0..0..0..0..0..0..0..0..1

..0..0..0..0..0..0..0..0..0..0..0....0..1..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..0..0..1

..0..0..0..0..0..0..0..0..0..0..1....0..0..0..0..0..0..0..0..0..0..1

CROSSREFS

Sequence in context: A115535 A109252 A142708 * A237962 A237744 A003927

Adjacent sequences: A224572 A224573 A224574 * A224576 A224577 A224578

KEYWORD

nonn

AUTHOR

R. H. Hardin, Apr 10 2013

STATUS

approved