A185518 Number of (n+1)X7 0..2 arrays with every 2X2 subblock singular

46303, 9856209, 541370505, 65652458491, 5157904182519, 525819969687473, 46861672135881249, 4536327635584899147, 421714260065729709743, 40230435280135273840049, 3792362066556802880530649

Offset

1,1

Comments

Column 6 of A185521

Links

R. H. Hardin, Table of n, a(n) for n = 1..200

Example

Some solutions for 3X7
..0..0..0..0..0..0..2....0..0..2..1..0..0..1....0..0..2..2..0..1..0
..0..2..0..1..2..0..2....0..0..0..0..0..0..0....0..0..0..0..0..0..0
..0..0..0..1..2..0..2....0..0..0..0..0..1..0....0..0..1..2..1..1..0

Crossrefs

Sequence in context: A190882 A251278 A202897 * A230237 A175170 A204495

Adjacent sequences: A185515 A185516 A185517 * A185519 A185520 A185521

Keyword

nonn

Author

R. H. Hardin Jan 29 2011

Status

approved