id:A067830 - OEIS Search Results

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Primes n such that sigma(n-4)<n.

+0
5

5, 7, 11, 17, 23, 41, 47, 71, 83, 101, 107, 113, 131, 167, 197, 227, 233, 281, 311, 317, 353, 383, 401, 443, 461, 467, 491, 503, 617, 647, 677, 743, 761, 773, 827, 857, 863, 881, 887, 911, 941, 971, 1013, 1091, 1097, 1217, 1283, 1301, 1307, 1427, 1433, 1451 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`Except for the initial terms, members are primes of the form p+4 with p prime, i.e. the sequence is essentially A031505, A046132. In other words the solutions to sigma(x)<x+4 are 1,2,4 and the odd primes. - R. Stephan, Feb 09 2004`
	CROSSREFS	`Cf. A025584.` `Sequence in context: A166574 A163846 A156104 this_sequence A106862 A027690 A087200` `Adjacent sequences: A067827 A067828 A067829 this_sequence A067831 A067832 A067833`
	KEYWORD	`nonn`
	AUTHOR	`Benoit Cloitre (benoit7848c(AT)orange.fr), Feb 08 2002`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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