A224580 - OEIS

A224580

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

2185738, 26918, 21966, 26528, 31062, 34588, 37202, 39188, 51306, 73564, 103876, 140148, 180814, 224838, 271582, 333314, 421494, 545192, 711240, 924840, 1190134, 1510622, 1904402

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

Diagonal of A224588

LINKS

Table of n, a(n) for n=1..23.

EXAMPLE

Some solutions for n=2

..1..0..0..0..0..0..0..0....0..0..0..0..0..0..0..0....1..1..0..0..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..1....1..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..0..0....0..0..1..1..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..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....1..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..0..0....0..0..1..1..1..0..0..0

CROSSREFS

Sequence in context: A105711 A250491 A348032 * A224581 A224588 A234332

Adjacent sequences: A224577 A224578 A224579 * A224581 A224582 A224583

KEYWORD

nonn

AUTHOR

R. H. Hardin Apr 11 2013

STATUS

approved