| 10, 15, 25, 34, 46, 51, 55, 57, 69, 86, 91, 95, 106, 119, 121, 133, 141, 145, 155, 161, 166, 217, 218, 226, 247, 249, 253, 262, 274, 291, 298, 299, 302, 305, 341, 358, 365, 382, 407, 413, 445, 446, 481, 485, 501, 515, 533, 538, 543, 551, 559, 614, 623, 626
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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This is the semiprime analogue of A061067.
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LINKS
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Eric Weisstein, World of Mathematics, Semiprime.
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FORMULA
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a(n) = A100466(n) - A100915(n) = A001358(A100915(n)).
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EXAMPLE
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a(1) = 10 because 10 = semiprime(4) and semiprime(4) + 4 = 14 is
semiprime.
a(2) = 15 because 15 = semiprime(6) and semiprime(6) + 6 = 21 is
semiprime.
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CROSSREFS
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Cf. A001358, A061067, A100493, A100466, A100467, A100915.
Adjacent sequences: A100913 A100914 A100915 this_sequence A100917 A100918 A100919
Sequence in context: A057990 A091022 A133372 this_sequence A001750 A029702 A053330
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KEYWORD
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easy,nonn
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AUTHOR
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Ray Chandler (rayjchandler(AT)sbcglobal.net), Nov 26 2004
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