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Search: id:A096003
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| A096003 |
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Smallest semiprime (A001358) which is at the end of an arithmetic progression of n semiprimes. |
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+0
4
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| 4, 6, 14, 46, 58, 221, 445, 497, 1211, 1561, 4195, 4393, 6347, 10717, 14233, 28213, 31451, 72965, 119029, 121603, 124177, 611261, 632171, 2003171, 2012771, 7466993, 7619243, 7771493, 7923743, 68029097
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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The next term is > 105000000. - Hugo Pfoertner (hugo(AT)pfoertner.org), Oct 22 2004
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EXAMPLE
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a(3)=14 since (4,9,14) [or (6,10,14)] is an arithmetic progression of 3 semiprimes ending in 14 and 14 is the smallest semiprime with this property.
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CROSSREFS
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Cf. A001358 (semiprimes), A005115 (analogue for primes).
For the associated gaps see A097824.
Sequence in context: A106526 A108516 A077068 this_sequence A114058 A135093 A141667
Adjacent sequences: A096000 A096001 A096002 this_sequence A096004 A096005 A096006
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KEYWORD
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nonn
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com), Jul 28 2004
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EXTENSIONS
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More terms from T. D. Noe (noe(AT)sspectra.com) and Ray Chandler (rayjchandler(AT)sbcglobal.net), Jul 29 2004
a(18)-a(20) from Ray Chandler (rayjchandler(AT)sbcglobal.net), Aug 01 2004
More terms from Hugo Pfoertner (hugo(AT)pfoertner.org), Aug 27 2004
a(26)-a(30) from Hugo Pfoertner (hugo(AT)pfoertner.org), Sep 07 2004
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