id:A088377 - OEIS Search Results

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(Smallest prime-factor of n)^2.

+0
6

1, 4, 9, 4, 25, 4, 49, 4, 9, 4, 121, 4, 169, 4, 9, 4, 289, 4, 361, 4, 9, 4, 529, 4, 25, 4, 9, 4, 841, 4, 961, 4, 9, 4, 25, 4, 1369, 4, 9, 4, 1681, 4, 1849, 4, 9, 4, 2209, 4, 49, 4, 9, 4, 2809, 4, 25, 4, 9, 4, 3481, 4, 3721, 4, 9, 4, 25, 4, 4489, 4, 9, 4, 5041, 4, 5329, 4, 9, 4 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`a(n) = A000290(A020639(n)).`
	LINKS	`Eric Weisstein's World of Mathematics, Least Prime Factor` `Eric Weisstein's World of Mathematics, Square Number`
	CROSSREFS	`Cf. A088378, A088379.` `Cf. A068319.` `Sequence in context: A061767 A131016 A061369 this_sequence A066048 A103164 A005063` `Adjacent sequences: A088374 A088375 A088376 this_sequence A088378 A088379 A088380`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Sep 28 2003`

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Last modified December 15 00:47 EST 2009. Contains 170825 sequences.

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