id:A061394 - OEIS Search Results

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Number of distinct prime factors of n-th least prime signature (A025487); also a(n)-th prime is largest prime factor of n-th least prime signature; also a(n)-th primorial number is largest primorial factor of n-th least product of primorial numbers.

+0
5

0, 1, 1, 2, 1, 2, 1, 2, 3, 1, 2, 2, 3, 1, 2, 2, 3, 1, 2, 3, 2, 4, 2, 3, 1, 2, 3, 2, 4, 2, 3, 1, 2, 3, 2, 4, 2, 3, 3, 1, 3, 2, 4, 2, 3, 2, 4, 2, 3, 3, 1, 3, 2, 5, 4, 2, 3, 2, 4, 2, 3, 3, 1, 3, 2, 5, 4, 2, 3, 3, 2, 4, 3, 4, 2, 3, 4, 3, 2, 1, 3, 2, 5, 4, 2, 3, 3, 2, 4, 3, 4, 2, 5, 3, 4, 3, 2, 1, 3, 2, 5, 4, 2, 3, 3 (list; graph; listen)

	OFFSET	`0,4`
	FORMULA	`a(n) = A061395(A025487(n)). A000040(a(n)) = A006530(A025487(n)).`
	CROSSREFS	`Adjacent sequences: A061391 A061392 A061393 this_sequence A061395 A061396 A061397` `Sequence in context: A080237 A136109 A105265 this_sequence A136314 A121997 A023128`
	KEYWORD	`nonn`
	AUTHOR	`Henry Bottomley (se16(AT)btinternet.com), Apr 30 2001`

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Last modified October 12 15:26 EDT 2008. Contains 144830 sequences.

AT&T Labs Research