A061491 - OEIS

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A061491

a(1) = 1, a(n) = least number such that the concatenation a(n)a(n-1)...a(1) is a cube.

1, 133, 100330363, 100000000300330000300660363, 100000000000000000000000000300000000300330000000000000300000000600660000300660 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,2`
	EXAMPLE	`a(1) = 1, a(2) = 133, a(2)a(1) = 1331 = 11^3.`
	CROSSREFS	`Cf. A061359, A061361, A061363.` `Sequence in context: A015264 A055579 A191715 * A048128 A047824 A020353` `Adjacent sequences: A061488 A061489 A061490 * A061492 A061493 A061494`
	KEYWORD	`base,nonn`
	AUTHOR	`Amarnath Murthy (amarnath_murthy(AT)yahoo.com), May 06 2001`
	EXTENSIONS	`More terms from UlrSchimke(AT)aol.com, Nov 06, 2001`

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Last modified February 17 00:09 EST 2012. Contains 205978 sequences.