A008329 - OEIS

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A008329

Number of divisors of p+1, p prime.

2, 3, 4, 4, 6, 4, 6, 6, 8, 8, 6, 4, 8, 6, 10, 8, 12, 4, 6, 12, 4, 10, 12, 12, 6, 8, 8, 12, 8, 8, 8, 12, 8, 12, 12, 8, 4, 6, 16, 8, 18, 8, 14, 4, 12, 12, 6, 12, 12, 8, 12, 20, 6, 18, 8, 16, 16, 10, 4, 8, 6, 12, 12, 16, 4, 8, 6, 6, 12, 12, 8, 24, 10, 8, 12, 16, 16, 4, 8, 8, 24, 4, 20, 8, 16 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`1,1`
	LINKS	`Table of n, a(n) for n=1..85.`
	MAPLE	`for i from 1 to 500 do if isprime(i) then print(tau(i+1)); fi; od;`
	MATHEMATICA	`DivisorSigma[0, #]&/@(Prime[Range[100]]+1) (* From Harvey P. Dale, Apr 12 2011 *)`
	CROSSREFS	`Sequence in context: A036805 A036804 A180046 * A064558 A178031 A008328` `Adjacent sequences: A008326 A008327 A008328 * A008330 A008331 A008332`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane.`
	EXTENSIONS	`Offset corrected by Leroy Quet, Oct 08 2008`
	STATUS	`approved`

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Last modified May 24 20:01 EDT 2013. Contains 225630 sequences.