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Search: id:A124792
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| 18, 42, 50, 78, 92, 110, 130, 138, 154, 164, 222, 230, 236, 266, 282, 284, 285, 338, 357, 366, 370, 374, 404, 425, 426, 429, 430, 438, 452, 555, 574, 582, 590, 596, 602, 605, 610, 637, 638, 654, 668, 682, 710, 754, 764, 782, 814, 826, 854, 874, 894, 908, 938
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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Cf. A014612 = 3-almost primes, A001414 = sopfr(n).
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EXAMPLE
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8 is not here because 8=2*2*2=>2+2+2=6=2*3 (semiprime),
12 is not here because 12=2*2*3=>2+2+3=7 (prime),
18 is here because 18=2*3*3=>2+3+3=8=2*2*2 (3-almost prime),
20, 27, 28, 30, are not here,
42 is here because 42=2*3*7=>2+3+7=12=2*2*3 (3-almost prime).
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CROSSREFS
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Cf. A001414, A014612.
Sequence in context: A043898 A097972 A154284 this_sequence A090605 A105550 A144737
Adjacent sequences: A124789 A124790 A124791 this_sequence A124793 A124794 A124795
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KEYWORD
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nonn
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AUTHOR
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Zak Seidov (zakseidov(AT)yahoo.com), Nov 07 2006
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