A204145 - 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

A204145

Number of (n+2)X(n+2) 0..2 arrays with every 3X3 subblock having equal diagonal elements or equal antidiagonal elements, and new values 0..2 introduced in row major order

689, 28982, 844136, 26497814, 839477288, 25723818038, 770374556792, 23033174207414, 678601817988824

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

OFFSET

1,1

COMMENTS

Diagonal of A204153

LINKS

Table of n, a(n) for n=1..9.

EXAMPLE

Some solutions for n=4

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

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