A224593 Number of (n+7)X11 0..1 matrices with each 8X8 subblock idempotent

951062, 101365, 92168, 100678, 108764, 114337, 118423, 121292, 123353, 141953, 177824, 226487, 283848, 346662, 413310, 482163, 552699, 641443, 765730, 938128, 1167282, 1458593, 1816490, 2242866, 2739201, 3323721, 4032087, 4912170, 6021111

Offset

1,1

Comments

Column 4 of A224597

Links

R. H. Hardin, Table of n, a(n) for n = 1..77

Formula

Empirical: a(n) = 2*a(n-1) -2*a(n-2) +2*a(n-3) -2*a(n-4) +3*a(n-5) -3*a(n-6) +2*a(n-7) -a(n-9) +a(n-10) -2*a(n-11) +3*a(n-12) -5*a(n-13) +4*a(n-14) -3*a(n-15) +2*a(n-16) -2*a(n-17) +2*a(n-18) -a(n-20) +2*a(n-21) -a(n-22) +a(n-23) -a(n-24) +a(n-25) -a(n-26) for n>33

Example

Some solutions for n=3
..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..0....1..0..0..0..0..0..0..0..1..0..0
..1..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..1..0....0..0..0..0..0..0..0..0..0..0..0
..1..0..0..0..0..0..0..0..0..1..0....1..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..1..0..0
..1..0..0..0..0..0..0..0..0..1..0....1..0..0..0..0..0..0..0..1..0..0
..0..0..0..0..0..0..0..0..0..1..0....1..0..0..0..0..0..0..0..1..0..0
..0..0..0..0..0..0..0..0..0..1..0....0..0..0..0..0..0..0..0..1..0..0
..1..0..0..0..0..0..0..0..0..1..0....1..0..0..0..0..0..0..0..1..0..0

Crossrefs

Sequence in context: A346353 A203823 A251911 * A341897 A341898 A092377

Adjacent sequences: A224590 A224591 A224592 * A224594 A224595 A224596

Keyword

nonn

Author

R. H. Hardin Apr 11 2013

Status

approved