id:A064478 - OEIS Search Results

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For an integer n with prime factorization p1*p2*p3* ... *pn, a(n) = (p1+1)*(p2+1)*(p3+1)* ... *(pn+1).

+0
5

1, 2, 3, 4, 9, 6, 12, 8, 27, 16, 18, 12, 36, 14, 24, 24, 81, 18, 48, 20, 54, 32, 36, 24, 108, 36, 42, 64, 72, 30, 72, 32, 243, 48, 54, 48, 144, 38, 60, 56, 162, 42, 96, 44, 108, 96, 72, 48, 324, 64, 108, 72, 126, 54, 192, 72, 216, 80, 90, 60, 216, 62, 96, 128, 729, 84, 144 (list; graph; listen)

	OFFSET	`0,2`
	COMMENT	`a(0)=1 and a(1)=2 by convention.`
	CROSSREFS	`Cf. A064476, A064479, A003958. Apart from initial terms, same as A003959.` `Adjacent sequences: A064475 A064476 A064477 this_sequence A064479 A064480 A064481` `Sequence in context: A091205 A106447 A060866 this_sequence A111798 A115305 A098550`
	KEYWORD	`nonn,nice,easy`
	AUTHOR	`njas, Oct 06 2001`
	EXTENSIONS	`More terms from Vladeta Jovovic (vladeta(AT)Eunet.yu), Oct 06 2001`

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Last modified October 13 20:18 EDT 2008. Contains 145016 sequences.

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