A240038 Number of nX7 0..2 arrays with no element equal to zero plus the sum of elements to its left or zero plus the sum of elements above it or zero plus the sum of the elements diagonally to its northwest, modulo 3

16, 20, 114, 162, 494, 710, 1976, 2884, 7958, 12074, 31824, 49078, 130758, 197208, 535668, 803976, 2179014, 3283200, 8870448, 13320072, 36010660, 54089046, 145864864, 219566360, 590450318, 889464830, 2389662890, 3599725594

Offset

1,1

Comments

Column 7 of A240039

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

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

Crossrefs

Sequence in context: A213241 A219395 A260572 * A188242 A103330 A045667

Adjacent sequences: A240035 A240036 A240037 * A240039 A240040 A240041

Keyword

nonn

Author

R. H. Hardin, Mar 31 2014

Status

approved