A121536 - OEIS

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A121536

Smallest m such that m^3>=n^2.

1, 2, 3, 3, 3, 4, 4, 4, 5, 5, 5, 6, 6, 6, 7, 7, 7, 7, 8, 8, 8, 8, 9, 9, 9, 9, 9, 10, 10, 10, 10, 11, 11, 11, 11, 11, 12, 12, 12, 12, 12, 13, 13, 13, 13, 13, 14, 14, 14, 14, 14, 14, 15, 15, 15, 15, 15, 15, 16, 16, 16, 16, 16, 16, 17, 17, 17, 17, 17, 17, 18, 18, 18, 18, 18, 18, 19, 19 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,2`
	COMMENTS	`If n is a cube a(n)=A100196(n), otherwise a(n)=A100196(n)+1. Also, a(n)=(A070923(n)+n^2)^(1/3).`
	FORMULA	`a(n)=ceiling(n^(2/3)), n=1,2,...`
	MATHEMATICA	`Table[Ceiling[n^(2/3)], {n, 1, 100}]`
	CROSSREFS	`Cf. A070923, A100196.` `Sequence in context: A202304 A047745 A196176 * A080405 A039728 A029119` `Adjacent sequences: A121533 A121534 A121535 * A121537 A121538 A121539`
	KEYWORD	`nonn`
	AUTHOR	`Zak Seidov (zakseidov(AT)yahoo.com), Aug 05 2006`

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Last modified February 16 04:47 EST 2012. Contains 205860 sequences.