id:A073734 - OEIS Search Results

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Gcd of consecutive members of the EKG sequence A064413.

+0
2

1, 2, 2, 3, 3, 3, 4, 2, 5, 5, 3, 2, 7, 7, 3, 8, 4, 2, 11, 11, 3, 3, 5, 5, 7, 2, 13, 13, 3, 4, 2, 17, 17, 3, 2, 19, 19, 3, 5, 4, 2, 23, 23, 3, 2, 2, 2, 2, 7, 7, 3, 5, 5, 5, 2, 29, 29, 3, 2, 31, 31, 3, 8, 4, 2, 37, 37, 3, 3, 2, 4, 2, 41, 41, 3, 3, 7, 11, 2, 43, 43, 3, 5, 5, 5, 4, 2, 47, 47, 3, 2, 7 (list; graph; listen)

	OFFSET	`2,2`
	COMMENT	`All terms shown are prime powers, but this does not hold for all n. For n > 2, a(n) is divisible by A064740(n).`
	LINKS	`J. C. Lagarias, E. M. Rains and N. J. A. Sloane, The EKG sequence, Exper. Math. 11 (2002), 437-446.` `Index entries for sequences related to EKG sequence`
	FORMULA	`a(n) = gcd(A064413(n-1), A064413(n)).`
	EXAMPLE	`a(8) = 4 because gcd(A064413(7), A064413(8)) = gcd(12, 8) = 4.`
	CROSSREFS	`Cf. A064413, A064740, A073735.` `Adjacent sequences: A073731 A073732 A073733 this_sequence A073735 A073736 A073737` `Sequence in context: A128586 A130971 A051776 this_sequence A062558 A072789 A126302`
	KEYWORD	`easy,nonn`
	AUTHOR	`David Wasserman (wasserma(AT)spawar.navy.mil), Aug 06 2002`

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Last modified October 10 20:39 EDT 2008. Contains 144831 sequences.

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