A240270 Number of n X 6 0..3 arrays with no element equal to zero plus the sum of elements to its left or one plus the sum of elements above it or one plus the sum of the elements diagonally to its northwest, modulo 4.

132, 3263, 64721, 2059061, 40760821, 1063706501, 27923918285, 576407548906, 15326042676144, 369518944004863, 8336460134026971, 218307022801923486, 5056252479593806048, 120075470956639787034, 3035930439648129383298, 70195938981000651308814, 1715146649978790187421012

Offset

1,1

Links

R. H. Hardin, Table of n, a(n) for n = 1..18

Example

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

Crossrefs

Column 6 of A240271.

Sequence in context: A254646 A242147 A023902 * A168180 A392315 A236260

Adjacent sequences: A240267 A240268 A240269 * A240271 A240272 A240273

Keyword

nonn

Author

R. H. Hardin, Apr 03 2014

Status

approved