A068254 - OEIS

This site is supported by donations to The OEIS Foundation.

A068254

1/4 the number of colorings of an n X n square array with 4 colors.

1, 21, 2403, 1500183, 5110723191, 95013316876491, 9639473169171326643, 5336900216006709884938623 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,2`
	CROSSREFS	`Cf. A068239-A068305, A000332, A002417, A027441.` `Sequence in context: A123844 A172622 A172675 * A144853 A131314 A122801` `Adjacent sequences: A068251 A068252 A068253 * A068255 A068256 A068257`
	KEYWORD	`nonn`
	AUTHOR	`R. H. Hardin (rhhardin(AT)att.net), Feb 24 2002`

Content is available under The OEIS End-User License Agreement .

Last modified February 17 19:07 EST 2012. Contains 206085 sequences.