A265488 - OEIS

A265488

Number of (3n-2)X2 0..6n-5 arrays with upper left zero and lower right 6n-5 and each element differing from its horizontal, vertical and diagonal neighbors by a power of two.

1, 12, 1030, 298764, 83948008, 22511356876, 10087240306899, 3527678938392395, 1384849739444093464, 509526476766763110063, 197694082692466208850553, 132949897804861666617140704, 58944850608913545191419115404

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

COMMENTS

Column 2 of A265494 (terms of the form 3n-2).

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..70

EXAMPLE

Some solutions for n=2

..0..1....0..4....0..1....0..1....0..4....0..4....0..4....0..1....0..4....0..4

..1..2....4..2....1..2....4..2....1..2....4..2....4..2....4..2....1..2....4..2

..5..3....5..6....5..3....5..3....5..3....5..3....5..6....5..6....5..3....5..3