id:A063928 - OEIS Search Results

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Largest nonprime proper divisor of n (with a(1)=1).

+0
3

1, 1, 1, 1, 1, 1, 1, 4, 1, 1, 1, 6, 1, 1, 1, 8, 1, 9, 1, 10, 1, 1, 1, 12, 1, 1, 9, 14, 1, 15, 1, 16, 1, 1, 1, 18, 1, 1, 1, 20, 1, 21, 1, 22, 15, 1, 1, 24, 1, 25, 1, 26, 1, 27, 1, 28, 1, 1, 1, 30, 1, 1, 21, 32, 1, 33, 1, 34, 1, 35, 1, 36, 1, 1, 25, 38, 1, 39, 1, 40, 27, 1, 1, 42, 1, 1, 1, 44, 1 (list; graph; listen)

	OFFSET	`1,8`
	COMMENT	`a(m)a(n)<=a(mn); a(m)a(n)=a(mn) iff m and n are prime or = 1. - Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Apr 11 2008`
	LINKS	`R. Zumkeller, Table of n, a(n) for n = 1..1000`
	CROSSREFS	`a(n)=1 if n is 1, prime (A000040), or the product of two primes (A001358), i.e. if n is in A037143, otherwise, with n in A033942, a(n)=A032742(n). Cf. A006530.` `Sequence in context: A131301 A083730 A008833 this_sequence A131299 A073937 A074058` `Adjacent sequences: A063925 A063926 A063927 this_sequence A063929 A063930 A063931`
	KEYWORD	`nonn`
	AUTHOR	`Henry Bottomley (se16(AT)btinternet.com), Aug 15 2001`

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Last modified July 25 07:41 EDT 2008. Contains 142293 sequences.

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