A137601 - OEIS

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A137601

a(n) is the smallest number m such that pi(m)+sigma(m)=n*m.

1, 2, 3902496 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,2`
	COMMENTS	`Next term is greater than 135*10^7.`
	EXAMPLE	`a(3)=3902496 because pi(3902496)+sigma(3902496)=3*3902496 and 3902496 is the smallest such number.`
	CROSSREFS	`Sequence in context: A124368 A037051 A071066 * A158347 A157991 A121390` `Adjacent sequences: A137598 A137599 A137600 * A137602 A137603 A137604`
	KEYWORD	`hard,more,nonn,less,bref`
	AUTHOR	`Farideh Firoozbakht (mymontain(AT)yahoo.com), Apr 11 2008`

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Last modified February 17 09:41 EST 2012. Contains 206009 sequences.