id:A086471 - OEIS Search Results

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Product of distinct (smallest) prime signature divisors.In case of two or more divisors with the same prime signature the smallest is considered to evaluate the product.

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1, 2, 3, 8, 5, 12, 7, 64, 27, 20, 11, 576, 13, 28, 45, 1024, 17, 1944, 19, 1600, 63, 44, 23, 110592, 125, 52, 729, 3136, 29, 360, 31, 32768, 99, 68, 175, 20736, 37, 76, 117, 512000, 41, 504, 43, 7744, 18225, 92, 47, 84934656, 343, 25000, 153, 10816, 53 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`a(p) = p and a(p^r) = p^(T(r)) where p is a prime and T(r) = the r-th triangular number = r(r+1)/2.`
	CROSSREFS	`Cf. A086469.` `Adjacent sequences: A086468 A086469 A086470 this_sequence A086472 A086473 A086474` `Sequence in context: A126139 A060872 A066959 this_sequence A097505 A095168 A130479`
	KEYWORD	`nonn`
	AUTHOR	`Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Jul 21 2003`
	EXTENSIONS	`More terms from David Wasserman (wasserma(AT)spawar.navy.mil), Mar 07 2005`

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Last modified October 13 20:18 EDT 2008. Contains 145016 sequences.

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