A224638 Number of (n+6)X7 0..2 matrices with each 7X7 subblock idempotent

145121216, 10906923, 6162817, 4750292, 4617228, 4971859, 5047936, 5029695, 5708639, 7589727, 11387955, 17128394, 24395022, 33632312, 44378240, 56580772, 72151138, 94546333, 128344682, 179174727, 253082925

Offset

1,1

Comments

Column 1 of A224642

Links

Table of n, a(n) for n=1..21.

Example

Some solutions for n=2
..0..0..0..0..2..0..0....0..0..0..0..2..2..0....0..0..0..0..0..0..0
..0..0..0..0..1..0..1....0..0..0..0..0..0..0....0..0..0..0..0..0..0
..0..0..0..0..0..0..2....0..0..0..0..0..0..0....0..0..0..0..0..0..0
..0..0..0..0..1..0..2....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..1..0..0....0..0..0..0..1..1..0....1..0..2..1..1..1..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..1....2..1..2..2..0..2..1....0..1..0..1..0..2..1

Crossrefs

Sequence in context: A204806 A186174 A224637 * A224642 A185855 A335399

Adjacent sequences: A224635 A224636 A224637 * A224639 A224640 A224641

Keyword

nonn

Author

R. H. Hardin Apr 13 2013

Status

approved