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A224576 Number of (n+5)X12 0..1 matrices with each 6X6 subblock idempotent 1
28708, 7843, 8294, 9164, 9946, 10561, 11032, 12921, 16072, 20202, 25024, 30332, 35979, 43392, 53814, 68241, 87358, 111648, 141447, 178530, 225887, 287540, 368172, 472953, 607389, 778773, 997360, 1277463, 1638054, 2103279, 2702790, 3473544 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A224577

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..192

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

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

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

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

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

CROSSREFS

Sequence in context: A172755 A172827 A145686 * A234835 A255659 A213460

Adjacent sequences:  A224573 A224574 A224575 * A224577 A224578 A224579

KEYWORD

nonn

AUTHOR

R. H. Hardin Apr 10 2013

STATUS

approved

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Last modified July 23 12:19 EDT 2021. Contains 346259 sequences. (Running on oeis4.)