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A162890 The set of exotic numbers A064818 extended by allowing the double factorials A006882 into the set of operations. 0
1, 2, 3, 15, 24, 25 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
LINKS
EXAMPLE
Using double factorials (!!) augments A064818 for example by 3 = 3!! and by 15 = (5!!)*1 = (5!!)/1 = (5!!)^1.
CROSSREFS
Sequence in context: A325236 A037175 A048613 * A030072 A064219 A244377
KEYWORD
more,nonn
AUTHOR
EXTENSIONS
Definition rephrased by R. J. Mathar, Aug 27 2009
STATUS
approved

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Last modified June 16 07:19 EDT 2024. Contains 373423 sequences. (Running on oeis4.)