A183830 Number of (n+1)X4 0..2 arrays with each element of every 2X2 subblock being the sum mod 3 of two others

523, 5323, 53589, 568635, 5935955, 63219545, 666851127, 7093125423, 75083743089, 797712241059, 8455615332243, 89775833375689, 952151137025019, 10105957184619287, 107209289222627269, 1137721555373998703

Offset

1,1

Comments

Column 3 of A183836

Links

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

Formula

Empirical: a(n)=13*a(n-1)+42*a(n-2)-942*a(n-3)+1259*a(n-4)+16804*a(n-5)-40879*a(n-6)-117777*a(n-7)+381433*a(n-8)+303856*a(n-9)-1519845*a(n-10)+56140*a(n-11)+2613108*a(n-12)-1083416*a(n-13)-1748449*a(n-14)+1024510*a(n-15)+314900*a(n-16)-213340*a(n-17)+10760*a(n-18)+1824*a(n-19)

Example

Some solutions for 3X4
..1..2..1..0....2..0..2..0....0..1..2..1....2..0..1..2....2..2..2..1
..2..1..2..2....2..1..1..1....2..1..2..1....1..2..1..0....1..0..1..2
..1..0..1..1....1..2..2..0....1..2..0..2....2..0..2..1....2..2..2..1

Crossrefs

Sequence in context: A066540 A209875 A080912 * A207212 A207206 A206732

Adjacent sequences: A183827 A183828 A183829 * A183831 A183832 A183833

Keyword

nonn

Author

R. H. Hardin Jan 07 2011

Status

approved