login
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
OFFSET
1,1
COMMENTS
Column 6 of A224588
LINKS
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
KEYWORD
nonn
AUTHOR
R. H. Hardin Apr 11 2013
STATUS
approved