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Search: id:A076246
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| A076246 |
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Totients of those numbers at which values of A051547 [=a(n)=LCM {phi(1), ..., phi(n)}] increase: in these consecutive terms new prime powers arise i.e. which did not occur in neither of preceding terms. |
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2
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| 2, 4, 6, 10, 8, 16, 18, 22, 28, 46, 32, 52, 58, 54, 82, 64, 100, 102, 106, 148, 162, 166, 172, 178, 190, 196, 226, 250, 128, 256, 262, 268, 282, 292, 310, 316, 346, 358, 366, 382, 388, 466, 478, 486, 502, 508, 556, 562, 568, 586, 606, 618, 642, 652, 676, 708
(list; graph; listen)
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OFFSET
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1,1
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EXAMPLE
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8=2.2.2 immediately follows 10=2.5 or 58-2.29 follows 52=2.2.13. In both cases with new prime factor[like 29] or old one at higher power[like 2.2.2].
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MATHEMATICA
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s0=1; s1=1; Do[s0=s1; s1=LCM[s1, EulerPhi[n]]; If[ !Equal[s0, s1], Print[n]], {n, 1, 1000}]
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CROSSREFS
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Cf. A051547, A003418, A051451, A076244, A076245.
Sequence in context: A073659 A073661 A079052 this_sequence A100426 A089227 A109133
Adjacent sequences: A076243 A076244 A076245 this_sequence A076247 A076248 A076249
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KEYWORD
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nonn
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AUTHOR
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Labos E. (labos(AT)ana.sote.hu), Oct 08 2002
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