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A063529 M[2^n-1], where M[] is A029834, a discrete version of the Mangoldt function: if n is prime then floor(log(n)) else 0 and 2^n-1 is A000225. 0
0, 1, 1, 0, 3, 0, 4, 0, 0, 0, 0, 0, 9, 0, 0, 0, 11, 0, 13, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 21, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 42, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 61, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,5

LINKS

Table of n, a(n) for n=1..101.

PROG

(PARI) j=[]; for(n=1, 150, j=concat(j, if(isprime(2^n-1), floor(log(2^n-1)), ))); j

CROSSREFS

Cf. A029832, A029833, A053821, A062590, A029834, A000225.

Sequence in context: A272722 A229694 A033596 * A136667 A004588 A272474

Adjacent sequences:  A063526 A063527 A063528 * A063530 A063531 A063532

KEYWORD

easy,nonn

AUTHOR

Jason Earls, Aug 01 2001

STATUS

approved

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Last modified September 16 18:24 EDT 2019. Contains 327116 sequences. (Running on oeis4.)