id:A072056 - OEIS Search Results

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A072056

Number of divisors of 2*prime(n)+1.

+0
3

2, 2, 2, 4, 2, 4, 4, 4, 2, 2, 6, 6, 2, 4, 4, 2, 4, 4, 8, 4, 6, 4, 2, 2, 8, 4, 6, 4, 4, 2, 8, 2, 6, 6, 4, 4, 12, 4, 4, 2, 2, 6, 2, 6, 4, 8, 6, 4, 8, 8, 2, 2, 8, 2, 4, 4, 6, 4, 8, 2, 10, 2, 8, 4, 8, 4, 8, 12, 4, 4, 4, 2, 12, 6, 8, 4, 4, 8, 4, 12, 2, 4, 2, 6, 4, 2, 4, 8, 4, 6, 8, 4, 12 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`Divisors of A072055(8)=2A000040(8)+1=219+1=39: {1,3,13,39} with size 4, therefore a(8)=4.`
	CROSSREFS	`a(n)=A000005(A072055(n)), A000040, A072057.` `Sequence in context: A072048 A161841 A152674 this_sequence A066012 A063375 A064129` `Adjacent sequences: A072053 A072054 A072055 this_sequence A072057 A072058 A072059`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Jun 11 2002`

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Last modified November 29 12:46 EST 2009. Contains 167659 sequences.

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