A222822 Number of idempotent 3X3 0..n matrices

50, 122, 218, 344, 488, 668, 860, 1088, 1334, 1610, 1898, 2234, 2570, 2942, 3338, 3764, 4196, 4676, 5156, 5684, 6224, 6788, 7364, 8000, 8630, 9290, 9974, 10694, 11414, 12194, 12962, 13778, 14606, 15458, 16334, 17264, 18176, 19124, 20096, 21116, 22124

Offset

1,1

Comments

Row 3 of A222821

Links

R. H. Hardin, Table of n, a(n) for n = 1..81

Example

Some solutions for n=3
..0..0..0....1..0..0....1..0..0....1..0..0....1..0..0....0..0..0....0..0..0
..0..0..0....1..0..0....2..0..0....0..1..0....2..0..3....1..1..1....0..1..0
..0..0..0....0..0..0....0..0..1....2..1..0....0..0..1....0..0..0....0..1..0

Crossrefs

Sequence in context: A044237 A044618 A248531 * A212226 A031397 A045181

Adjacent sequences: A222819 A222820 A222821 * A222823 A222824 A222825

Keyword

nonn

Author

R. H. Hardin Apr 09 2013

Status

approved