

A225093


a(1)=2, a(2)=3, for n>=3, a(n) is the nth number which is obtained by application of Eratostheneslike sieve to A225091.


11



2, 3, 7, 13, 5, 11, 31, 43, 37, 29, 73, 79, 19, 41, 97, 59, 103, 127, 71, 157, 17, 163, 89, 23, 107, 211, 181, 241, 199, 131, 67, 101, 61, 271, 277, 149, 313, 307, 47, 367, 173, 397, 331, 409, 179, 197, 191, 457, 251, 499, 239, 233, 487, 139, 547, 523, 571, 151
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OFFSET

1,1


COMMENTS

We conjecture that every term is prime; moreover, we conjecture that the sequence is a permutation of the sequence of all primes.  Vladimir Shevelev, Dec 17 2014


LINKS

Peter J. C. Moses, Table of n, a(n) for n = 1..2000


MATHEMATICA

Flatten[{{2, 3}, DeleteDuplicates[Select[Map[#/(2^IntegerExponent[#, 2])&[Total[IntegerDigits[7^#]]]&, Range[200]], PrimeQ]]}] (* Peter J. C. Moses, Apr 27 2013 *)


CROSSREFS

Cf. A000040, A221858, A225017, A225039, A225040, A225091, A251964, A252280, A252281, A252282, A252283.
Sequence in context: A084423 A068134 A249051 * A278007 A081256 A084955
Adjacent sequences: A225090 A225091 A225092 * A225094 A225095 A225096


KEYWORD

nonn


AUTHOR

Vladimir Shevelev, Apr 27 2013


EXTENSIONS

More terms from Peter J. C. Moses, Apr 27 2013


STATUS

approved



