A129884 - OEIS

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A129884

Sequence a_{s_n} arising in enumeration of arrays of directed blocks (see Quaintance reference for precise definition), where a_n = A129878, s_n = A129873.

1, 1, 4, 4, 16, 17, 72, 79 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,3`
	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: A164111 A164906 A170833 * A137725 A082649 A156232` `Adjacent sequences: A129881 A129882 A129883 * A129885 A129886 A129887`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com), May 26 2007`

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Last modified February 16 10:32 EST 2012. Contains 205904 sequences.