A129875 - OEIS

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A129875

Sequence t_n arising in enumeration of arrays of directed blocks (see Quaintance reference for precise definition).

0, 2, 4, 9, 22, 45, 120, 239 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,2`
	REFERENCES	`Jocelyn Quaintance, Combinatoric Enumeration of Two-Dimensional Proper Arrays, Discrete Math., 307 (2007), 1844-1864.`
	FORMULA	`See Quaintance reference for generating functions that produce A129872-A129886.`
	CROSSREFS	`Sequence in context: A148076 A156801 A057580 * A055094 A055729 A048211` `Adjacent sequences: A129872 A129873 A129874 * A129876 A129877 A129878`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com), May 26 2007`

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Last modified February 16 08:13 EST 2012. Contains 205893 sequences.