A184040 - OEIS

A184040

1/9 the number of (n+1)X(n+1) 0..2 arrays with all 2X2 subblocks having the same four values

9, 21, 41, 81, 153, 297, 569, 1113, 2169, 4281, 8441, 16761, 33273, 66297 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`1,1`
	COMMENTS	`Diagonal of A184048`
	LINKS	`Table of n, a(n) for n=1..14.`
	EXAMPLE	`Some solutions for 5X5` `..1..0..1..0..1....1..2..1..0..1....1..0..1..0..1....0..1..0..1..0` `..1..0..1..0..1....0..0..0..2..0....2..0..2..0..2....1..1..1..1..1` `..0..1..0..1..0....1..2..1..0..1....0..1..0..1..0....1..0..1..0..1` `..0..1..0..1..0....0..0..0..2..0....0..2..0..2..0....1..1..1..1..1` `..0..1..0..1..0....1..2..1..0..1....1..0..1..0..1....0..1..0..1..0`
	CROSSREFS	`Sequence in context: A338911 A107890 A110209 * A242990 A053476 A110680` `Adjacent sequences: A184037 A184038 A184039 * A184041 A184042 A184043`
	KEYWORD	`nonn`
	AUTHOR	`R. H. Hardin Jan 08 2011`
	STATUS	`approved`

Last modified March 24 12:09 EDT 2023. Contains 361479 sequences. (Running on oeis4.)