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A098002 Sum of squares of distinct prime divisors p of n, where each p <= sqrt(n). +0
1
0, 0, 0, 4, 0, 4, 0, 4, 9, 4, 0, 13, 0, 4, 9, 4, 0, 13, 0, 4, 9, 4, 0, 13, 25, 4, 9, 4, 0, 38, 0, 4, 9, 4, 25, 13, 0, 4, 9, 29, 0, 13, 0, 4, 34, 4, 0, 13, 49, 29, 9, 4, 0, 13, 25, 53, 9, 4, 0, 38, 0, 4, 58, 4, 25, 13, 0, 4, 9, 78, 0, 13, 0, 4, 34, 4, 49, 13, 0, 29, 9, 4, 0, 62, 25, 4, 9, 4, 0, 38, 49 (list; graph; listen)
OFFSET

1,4

LINKS

Leroy Quet, Home Page (listed in lieu of email address)

EXAMPLE

2 and 3 are the distinct prime divisors of 12 and both 2 and 3 are <= squareroot of 12, so a(12) = 2^2 + 3^2 = 13.

CROSSREFS

Cf. A097974.

Sequence in context: A010675 A035673 A035638 this_sequence A035622 A112919 A019201

Adjacent sequences: A097999 A098000 A098001 this_sequence A098003 A098004 A098005

KEYWORD

nonn

AUTHOR

Leroy Quet Sep 08 2004

EXTENSIONS

More terms from John W. Layman (layman(AT)math.vt.vdu), Sep 14 2004

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Last modified November 30 13:13 EST 2009. Contains 167758 sequences.


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