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A128703
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Numbers of the form 5^k*p, where 1 <= k <= 5 and p is a prime different from 5.
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2
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10, 15, 35, 50, 55, 65, 75, 85, 95, 115, 145, 155, 175, 185, 205, 215, 235, 250, 265, 275, 295, 305, 325, 335, 355, 365, 375, 395, 415, 425, 445, 475, 485, 505, 515, 535, 545, 565, 575, 635, 655, 685, 695, 725, 745, 755, 775, 785, 815, 835, 865, 875, 895, 905
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| Auxiliary sequence for A128704 which gives the number of groups of order a(n).
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LINKS
| Klaus Brockhaus, Table of n, a(n) for n=1..10000
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EXAMPLE
| 375 = 5^3*3 is a term.
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MATHEMATICA
| With[{upto=1000}, Select[Union[Flatten[5^Range[5] #&/@Drop[Prime[ Range[ PrimePi[ Ceiling[upto/5]]]], {3}]]], #<=upto&]] (* From Harvey P. Dale, Jul 27 2011 *)
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PROG
| (MAGMA) [ n: n in [1..910] | #t eq 2 and ((t[1, 1] lt 5 and t[1, 2] eq 1 and t[2, 1] eq 5 and t[2, 2] le 5) or (t[1, 1] eq 5 and t[1, 2] le 5 and t[2, 2] eq 1)) where t is Factorization(n) ];
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CROSSREFS
| Cf. A128704, A000351 (powers of 5).
Sequence in context: A060535 A037379 A055049 * A078818 A194267 A048061
Adjacent sequences: A128700 A128701 A128702 * A128704 A128705 A128706
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KEYWORD
| nonn
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AUTHOR
| Klaus Brockhaus (klaus-brockhaus(AT)t-online.de), Mar 26 2007
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