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Search: id:A074172
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| A074172 |
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Smaller of two consecutive numbers of the form p^2*q where p and q are primes. |
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+0
3
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| 44, 75, 98, 116, 147, 171, 244, 332, 387, 507, 548, 603, 604, 724, 844, 908, 931, 963, 1075, 1083, 1251, 1324, 1412, 1467, 1556, 1587, 1675, 1772, 2523, 2524, 2636, 2644, 2763, 3283, 3356, 3411, 3508, 3788, 3987, 4075, 4203, 4204, 4418, 4491, 4804, 4868
(list; graph; listen)
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OFFSET
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0,1
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EXAMPLE
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44 is a member as 44 = 2^2*11 and 45 = 3^2*5.
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MATHEMATICA
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lst={}; Do[f1=FactorInteger[n]; If[Sort[Transpose[f1][[2]]]=={1, 2}, f2=FactorInteger[n+1]; If[Sort[Transpose[f2][[2]]]=={1, 2}, AppendTo[lst, n]]], {n, 3, 10000}]; lst
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CROSSREFS
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Cf. A074173, A074174.
Sequence in context: A111494 A092025 A049103 this_sequence A039386 A043209 A043989
Adjacent sequences: A074169 A074170 A074171 this_sequence A074173 A074174 A074175
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KEYWORD
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nonn
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AUTHOR
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Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Aug 30 2002
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EXTENSIONS
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More terms from T. D. Noe (noe(AT)sspectra.com), Oct 04 2004
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