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A076245
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Numbers at which values of A051547 [=a(n)=LCM {phi(1), ..., phi(n)}] increase. Observe that both prime and composites [like 15,51] occur.
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2
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1, 3, 5, 7, 11, 15, 17, 19, 23, 29, 47, 51, 53, 59, 81, 83, 85, 101, 103, 107, 149, 163, 167, 173, 179, 191, 197, 227, 251, 255, 257, 263, 269, 283, 293, 311, 317, 347, 359, 367, 383, 389, 467, 479, 487, 503, 509, 557, 563, 569, 587, 607, 619, 643, 653, 677
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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EXAMPLE
| In totients of consecutive terms some prime-factor appears at higher power than in preceding ones: See A076246 and A051451.
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MATHEMATICA
| 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
| Cf. A051547, A003418, A051451, A076244.
Sequence in context: A082418 A085493 A139252 * A172308 A190812 A059748
Adjacent sequences: A076242 A076243 A076244 * A076246 A076247 A076248
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KEYWORD
| nonn
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AUTHOR
| Labos E. (labos(AT)ana.sote.hu), Oct 08 2002
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