id:A067926 - OEIS Search Results

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a(n)=phi(n^2+1)/n if (n^2+1) is composite and phi(n^2+1)==0 (mod n).

+0
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6, 25, 48, 60, 98, 150, 192, 304, 336, 896, 990, 800, 1248, 1232, 1210, 1105, 1798, 2448, 2790, 4032, 5166, 5095, 7488, 8925, 9798, 8484, 12540, 12528, 14448, 14112, 15994, 12950, 19998, 21312, 21222, 24198, 12288, 35768, 26560, 33792, 46620 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`If n^2+1 is prime, trivially phi(n^2+1)/n=n.`
	CROSSREFS	`Cf. A066820.` `Sequence in context: A042495 A018198 A079606 this_sequence A075224 A042185 A065069` `Adjacent sequences: A067923 A067924 A067925 this_sequence A067927 A067928 A067929`
	KEYWORD	`easy,nonn`
	AUTHOR	`Benoit Cloitre (benoit7848c(AT)orange.fr), Feb 22 2002`

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Last modified November 30 22:12 EST 2008. Contains 150989 sequences.

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