A224585 Number of (n+6)X11 0..1 matrices with each 7X7 subblock idempotent

128620, 26542, 26294, 28783, 31062, 32814, 34107, 35087, 40536, 50460, 63767, 79415, 96623, 114896, 133880, 158108, 191982, 238919, 301266, 380584, 477886, 593959, 733990, 907647, 1127983, 1410421, 1771896, 2230456, 2804799, 3518917

Offset

1,1

Comments

Column 5 of A224588

Links

R. H. Hardin, Table of n, a(n) for n = 1..136

Formula

Empirical: a(n) = 2*a(n-1) -a(n-2) +a(n-3) -a(n-4) -a(n-5) +a(n-6) +a(n-8) -a(n-9) -a(n-10) +a(n-12) +a(n-14) -a(n-15) for n>21

Example

Some solutions for n=2
..1..0..0..0..0..0..0..0..0..0..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
..1..0..0..0..0..0..0..0..0..0..1....0..0..0..1..0..0..0..1..0..0..1
..1..0..0..0..0..0..0..0..0..0..1....0..0..0..1..0..0..0..1..0..0..0
..1..0..0..0..0..0..0..0..0..0..0....0..0..0..1..0..0..0..1..0..0..0
..0..0..0..0..0..0..0..0..0..0..1....1..0..0..1..0..0..0..1..0..0..1
..1..0..0..0..0..0..0..0..0..0..1....1..0..0..0..0..0..0..0..0..0..1
..1..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: A234978 A235318 A151812 * A190819 A190838 A237072

Adjacent sequences: A224582 A224583 A224584 * A224586 A224587 A224588

Keyword

nonn

Author

R. H. Hardin Apr 11 2013

Status

approved