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A100493 n + n-th semiprime. +0
5
5, 8, 12, 14, 19, 21, 28, 30, 34, 36, 44, 46, 48, 52, 54, 62, 66, 69, 74, 77, 79, 84, 88, 93, 99, 103, 109, 113, 115, 117, 122, 125, 127, 129, 141, 147, 152, 156, 158, 161, 163, 165, 172, 177, 179, 187, 189, 191, 194, 196, 206, 210, 212, 215, 221, 225, 234, 236 (list; graph; listen)
OFFSET

1,1

COMMENT

This is the semiprime analogue of A014688.

LINKS

Eric Weisstein, World of Mathematics, Semiprime.

FORMULA

a(n) = n + A001358(n).

EXAMPLE

a(7) = 7 + semiprime(7) = 7 + 21 = 28.

CROSSREFS

Cf. A001358, A014688, A100466, A100467, A100915, A100916.

Adjacent sequences: A100490 A100491 A100492 this_sequence A100494 A100495 A100496

Sequence in context: A003246 A124378 A066299 this_sequence A005661 A108173 A047383

KEYWORD

easy,nonn

AUTHOR

Jonathan Vos Post (jvospost2(AT)yahoo.com), Nov 20 2004

EXTENSIONS

Edited, corrected and extended by Ray Chandler (rayjchandler(AT)sbcglobal.net), Nov 26 2004

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Last modified May 11 10:28 EDT 2008. Contains 139662 sequences.


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