id:A079448 - OEIS Search Results

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Primes p such that there is at least one integer x satisfying p=x*tau(x)-1 where tau(x)=A000005(x), the number of divisors of x.

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3, 5, 11, 13, 23, 31, 37, 59, 61, 71, 73, 79, 83, 103, 107, 131, 139, 151, 157, 167, 191, 193, 227, 239, 263, 269, 277, 307, 311, 313, 347, 379, 397, 421, 431, 443, 449, 457, 479, 487, 491, 499, 541, 563, 571, 587, 593, 613, 619, 631, 643, 661, 673, 701, 719 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`6*tau(6)=24 hence 23 is in the sequence`
	CROSSREFS	`Adjacent sequences: A079445 A079446 A079447 this_sequence A079449 A079450 A079451` `Sequence in context: A001122 A078971 A129096 this_sequence A045407 A095082 A105071`
	KEYWORD	`nonn`
	AUTHOR	`Benoit Cloitre (benoit7848c(AT)orange.fr), Jan 13 2003`

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Last modified October 15 09:18 EDT 2008. Contains 145015 sequences.

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