A145191 - OEIS

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A145191

Numbers n such that [sum_i=1..n {omega(i)^2}] / n = c, c is an integer, where omega(i) is (A001221).

1, 20, 68, 903, 3876, 3890 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,2`
	COMMENTS	`If for some n is c square, then we have RootMeanSquare(omega(1),....,omega(n))=c.`
	CROSSREFS	`Cf. A001221, A063971, A013939, A140480` `Sequence in context: A187156 A074632 A158444 * A044158 A044539 A153728` `Adjacent sequences: A145188 A145189 A145190 * A145192 A145193 A145194`
	KEYWORD	`easy,nonn`
	AUTHOR	`Ctibor O. Zizka (c.zizka(AT)email.cz), Oct 03 2008`

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Last modified February 15 19:15 EST 2012. Contains 205852 sequences.