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A224586 Number of (n+6)X12 0..1 matrices with each 7X7 subblock idempotent 1
138581, 27611, 27945, 30456, 32814, 34588, 35891, 36872, 42492, 52620, 66173, 82088, 99582, 118129, 137408, 162051, 196571, 244386, 307863, 388574, 487577, 605597, 748003, 924665, 1148883, 1436312, 1804191, 2270805, 2855176, 3581683 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A224588

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..115

FORMULA

Empirical: a(n) = 3*a(n-1) -2*a(n-2) -2*a(n-3) +3*a(n-4) -a(n-5) +a(n-7) -2*a(n-8) +2*a(n-10) -a(n-11) for n>17

EXAMPLE

Some solutions for n=2

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

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

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

CROSSREFS

Sequence in context: A081429 A236662 A251979 * A230032 A190386 A236276

Adjacent sequences:  A224583 A224584 A224585 * A224587 A224588 A224589

KEYWORD

nonn

AUTHOR

R. H. Hardin Apr 11 2013

STATUS

approved

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Last modified May 12 02:23 EDT 2021. Contains 343808 sequences. (Running on oeis4.)