id:A069354 - OEIS Search Results

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Lowest base with simple divisibility test for n primes; smallest B such that omega(B)+omega(B-1)=n.

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2, 3, 6, 15, 66, 210, 715, 7315, 38571, 254541, 728365, 11243155, 58524466 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`Described on Munafo's web page under the entry for the number 66`
	LINKS	`Robert Munafo, Notable Properties of Specific Numbers`
	EXAMPLE	`a(4)=15 because in base 15 you can test for divisibility by 4 different primes (3 and 5 directly, 2 and 7 by "casting out 14's")`
	CROSSREFS	`Cf. A001221.` `Sequence in context: A061059 A059842 A001529 this_sequence A007364 A014627 A109162` `Adjacent sequences: A069351 A069352 A069353 this_sequence A069355 A069356 A069357`
	KEYWORD	`nonn`
	AUTHOR	`Robert P. Munafo (mrob(AT)mrob.com), Nov 19 2002`

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Last modified September 4 21:24 EDT 2008. Contains 143414 sequences.