A224586 Number of (n+6)X12 0..1 matrices with each 7X7 subblock idempotent

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

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