id:A162890 - OEIS Search Results

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The set of exotic numbers A064818 extended by allowing the double factorials A006882 into the set of operations.

+0
1

1, 2, 3, 15, 24, 25 (list; graph; listen)

	OFFSET	`1,2`
	EXAMPLE	`Using double factorials (!!) augments A064818 for example by 3=3!! and by 15=(5!!)*1=(5!!)/1=(5!!)^1.`
	CROSSREFS	`Cf. A064818` `Sequence in context: A047176 A037175 A048613 this_sequence A030072 A064219 A124164` `Adjacent sequences: A162887 A162888 A162889 this_sequence A162891 A162892 A162893`
	KEYWORD	`more,nonn`
	AUTHOR	`Paolo P. Lava & Giorgio Balzarotti (ppl(AT)spl.at), Jul 16 2009`
	EXTENSIONS	`Definition rephrased by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Aug 27 2009`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.