A265193 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give

A265193

Number of 3Xn arrays containing n copies of 0..3-1 with no equal horizontal or antidiagonal neighbors and new values introduced sequentially from 0.

1, 5, 17, 42, 155, 511, 2023, 7760, 31395, 127575, 526459, 2194344, 9206121, 38933281, 165380299, 706470350, 3028761985, 13037475319, 56289258695, 243772244956, 1058354286379, 4606025822849, 20087808189187, 87780004451864

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

OFFSET

1,2

COMMENTS

Row 3 of A265192.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..129

EXAMPLE

Some solutions for n=4

..0..1..2..0....0..1..0..1....0..1..0..2....0..1..2..1....0..1..2..0

..2..0..2..1....0..2..0..2....2..1..0..2....0..1..2..1....2..0..1..2

..1..0..2..1....1..2..1..2....2..1..0..1....2..0..2..0....1..0..1..2