A107325 - OEIS

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A107325

Ceiling(A063655(n)/2).

1, 2, 2, 2, 3, 3, 4, 3, 3, 4, 6, 4, 7, 5, 4, 4, 9, 5, 10, 5, 5, 7, 12, 5, 5, 8, 6, 6, 15, 6, 16, 6, 7, 10, 6, 6, 19, 11, 8, 7, 21, 7, 22, 8, 7, 13, 24, 7, 7, 8, 10, 9, 27, 8, 8, 8, 11, 16, 30, 8, 31, 17, 8, 8, 9, 9, 34, 11, 13, 9, 36, 9, 37, 20, 10, 12, 9, 10, 40, 9, 9, 22, 42, 10, 11, 23, 16 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,2`
	COMMENTS	`a(n) is average (rounded up) of middle divisor(s) of n.`
	MATHEMATICA	`Do[l = Divisors[n]; k = Length[l]; If[EvenQ[k], m = (l[[k/2]] + l[[k/2 + 1]])/2, m = l[[(k+1)/2]]]; Print[Ceiling[m]], {n, 1, 100}] (Propper)`
	CROSSREFS	`Sequence in context: A038809 A078342 A177903 * A003050 A070868 A155216` `Adjacent sequences: A107322 A107323 A107324 * A107326 A107327 A107328`
	KEYWORD	`nonn`
	AUTHOR	`Leroy Quet May 21 2005`
	EXTENSIONS	`More terms from Ryan Propper (rpropper(AT)stanford.edu), Sep 17 2005`

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Last modified February 15 21:56 EST 2012. Contains 205860 sequences.