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A174939 a(n) = Sum_{k<=n} A007955(k) * A007955(k) = Sum_{k<=n} (A007955(k))^2, where A007955(m) = product of divisors of m. 0
1, 5, 14, 78, 103, 1399, 1448, 5544, 6273, 16273, 16394, 3002378, 3002547, 3040963, 3091588, 4140164, 4140453, 38152677, 38153038, 102153038, 102347519, 102581775, 102582304, 110177896480, 110177912105, 110178369081 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..26.

EXAMPLE

For n = 4, A007955(n) = b(n): a(4) = b(1)^2 + b(2)^2 + b(3)^2 + b(4)^2 = 1^2 + 2^2 + 3^2 + 8^2 = 78.

CROSSREFS

Sequence in context: A306751 A305341 A316611 * A320800 A321315 A203225

Adjacent sequences:  A174936 A174937 A174938 * A174940 A174941 A174942

KEYWORD

nonn

AUTHOR

Jaroslav Krizek, Apr 02 2010

STATUS

approved

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Last modified December 1 10:20 EST 2021. Contains 349426 sequences. (Running on oeis4.)