id:A074770 - OEIS Search Results

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Numbers n such that tau(n)>tau(n+1), phi(n)>phi(n+1) and sigma(n)>sigma(n+1).

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45, 117, 225, 273, 297, 345, 357, 405, 465, 513, 561, 621, 693, 705, 765, 777, 825, 837, 861, 885, 945, 1005, 1113, 1125, 1185, 1197, 1281, 1305, 1395, 1425, 1521, 1545, 1593, 1617, 1701, 1725, 1845, 1881, 1905, 1953, 1965, 2025, 2037, 2121, 2277 (list; graph; listen)

	OFFSET	`1,1`
	FORMULA	`It seems that a(n) is asymptotic to c*n with 52<c<54`
	EXAMPLE	`tau(117)=6>4=tau(118) phi(117)=72>58=phi(118) sigma(117)=182>180=sigma(118) hence 117 is in the sequence`
	CROSSREFS	`Sequence in context: A044232 A044613 A039528 this_sequence A140369 A044296 A044677` `Adjacent sequences: A074767 A074768 A074769 this_sequence A074771 A074772 A074773`
	KEYWORD	`nonn`
	AUTHOR	`Benoit Cloitre (benoit7848c(AT)orange.fr), Sep 07 2002`

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Last modified September 5 19:27 EDT 2008. Contains 143485 sequences.

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