A224619 Number of (n+4)X6 0..2 matrices with each 5X5 subblock idempotent

20465, 15354, 19596, 22081, 23453, 24252, 31702, 43635, 58076, 73708, 89988, 113491, 148896, 198454, 263524, 344683, 449230, 588930, 778104, 1032073, 1367122, 1806502, 2385414, 3153261, 4175034, 5531556, 7327326, 9701805, 12844004

Offset

1,1

Comments

Column 2 of A224625

Links

R. H. Hardin, Table of n, a(n) for n = 1..64

Formula

Empirical: a(n) = 2*a(n-1) -a(n-2) +a(n-3) -a(n-4) -a(n-7) +a(n-8) -a(n-9) +a(n-10) +a(n-12) -a(n-13) for n>18

Example

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

Crossrefs

Sequence in context: A281658 A234304 A242619 * A186060 A253866 A253873

Adjacent sequences: A224616 A224617 A224618 * A224620 A224621 A224622

Keyword

nonn

Author

R. H. Hardin Apr 12 2013

Status

approved