id:A068495 - OEIS Search Results

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Composite n such that n reduced mod(phi(n)) = sigma(n) reduced mod(n).

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6, 56, 260, 780, 992, 1976, 2156, 3696, 5520, 13800, 16256, 19872, 22560, 23688, 25232, 41072, 87000, 89964, 133984, 145888, 366720, 785808, 851760, 1100864, 1235052, 1270208, 1439552, 1470720, 2129400, 2237888 (list; graph; listen)

	OFFSET	`1,1`
	PROGRAM	`(PARI) for(n=3, 500000, if(n%eulerphi(n)==(1-isprime(n))*sigma(n)%n, print1(n, ", ")))`
	CROSSREFS	`Sequence in context: A045526 A137034 A053127 this_sequence A097126 A074019 A074018` `Adjacent sequences: A068492 A068493 A068494 this_sequence A068496 A068497 A068498`
	KEYWORD	`easy,nonn`
	AUTHOR	`Benoit Cloitre (benoit7848c(AT)orange.fr), Mar 11 2002`

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Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.

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