

A152114


Numbers a(n) are obtained by the application of an algorithm which is similar to sieve of Eratosthenes for A000045: retaining A000045(3)=2, we delete all multiples of 2, which are more than 2; retaining A000045(4)=3, we delete all multiples of 3, which are more than 3, etc.


1



2, 3, 5, 13, 89, 233, 1597, 4181, 28657, 514229, 1346269, 24157817, 165580141, 433494437
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OFFSET

1,1


COMMENTS

Since, as known, A000045((m,n))=(A000045(m),A000045(n)), then the indices of a(n) as terms of A000045, i.e., 3,4,5,7,11,13,..., except of 4, are the consecutive odd primes.
Apparently a variant of A030426. [From R. J. Mathar, Nov 27 2008]


LINKS

Table of n, a(n) for n=1..14.


CROSSREFS

Cf. A000045, A005478, A075736.
Sequence in context: A001685 A074691 A139589 * A139095 A005478 A117740
Adjacent sequences: A152111 A152112 A152113 * A152115 A152116 A152117


KEYWORD

nonn,easy


AUTHOR

Vladimir Shevelev, Nov 24 2008


STATUS

approved



