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 A253085 a(n) = A247649(A247647(n)). 4
 5, 7, 17, 19, 19, 31, 25, 61, 71, 41, 71, 77, 71, 91, 77, 107, 121, 85, 113, 103, 217, 251, 125, 251, 281, 121, 185, 151, 251, 289, 151, 281, 307, 251, 335, 281, 311, 349, 289, 373, 307, 383, 445, 247, 445, 487, 289, 397, 331, 389, 439, 331, 463, 409, 773, 895, 457, 895, 997, 349 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS The terms of A247649 are products of terms from this subsequence. It would be nice to have a characterization of this sequence that is independent of A247649. LINKS CROSSREFS Cf, A247647, A247648, A247649. Sequence in context: A075089 A075305 A140564 * A078764 A216731 A045318 Adjacent sequences:  A253082 A253083 A253084 * A253086 A253087 A253088 KEYWORD nonn AUTHOR N. J. A. Sloane, Feb 06 2015 STATUS approved

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Last modified January 20 13:11 EST 2019. Contains 319332 sequences. (Running on oeis4.)