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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). 0
1, 20, 68, 903, 3876, 3890 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

If for some n is c square, then we have RootMeanSquare(omega(1),....,omega(n))=c.

LINKS

Table of n, a(n) for n=1..6.

CROSSREFS

Cf. A001221, A063971, A013939, A140480

Sequence in context: A235281 A303620 A221521 * A044158 A044539 A297597

Adjacent sequences:  A145188 A145189 A145190 * A145192 A145193 A145194

KEYWORD

easy,nonn

AUTHOR

Ctibor O. Zizka, Oct 03 2008

STATUS

approved

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Last modified December 4 04:22 EST 2020. Contains 338921 sequences. (Running on oeis4.)