id:A068584 - OEIS Search Results

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Numbers n such that the denominators of sum(k=1,n,1/k)^2 equals the denominators of sum(k=1,n,1/k^2).

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1, 2, 3, 4, 5, 9, 15, 16, 17, 28, 29, 30, 31, 32, 49, 91, 92, 93, 94, 95, 96, 97, 98, 99, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 243, 244, 245, 246, 247, 248, 249, 968, 969, 970, 971, 972, 973, 974, 975, 976, 977, 978, 979, 980, 981, 982, 983, 984 (list; graph; listen)

	OFFSET	`1,2`
	FORMULA	`n such that A002805(n)^2=A007407(n)`
	CROSSREFS	`Sequence in context: A050160 A099472 A060732 this_sequence A107799 A003271 A049796` `Adjacent sequences: A068581 A068582 A068583 this_sequence A068585 A068586 A068587`
	KEYWORD	`easy,frac,nonn`
	AUTHOR	`Benoit Cloitre (benoit7848c(AT)orange.fr), Mar 27 2002`

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Last modified September 4 21:24 EDT 2008. Contains 143414 sequences.

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