A129878 - OEIS

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A129878

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

1, 3, 10, 42, 178, 787, 3552, 16319 (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: A009329 A009364 A149059 * A094558 A074511 A000249` `Adjacent sequences: A129875 A129876 A129877 * A129879 A129880 A129881`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com), May 26 2007`

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Last modified February 14 07:57 EST 2012. Contains 205602 sequences.