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A033457 G.c.d.-convolution of squares A000290 with themselves. 1
1, 2, 6, 4, 19, 6, 28, 24, 45, 10, 98, 12, 79, 94, 120, 16, 201, 18, 238, 164, 171, 22, 436, 120, 229, 234, 426, 28, 695, 30, 496, 352, 369, 370, 1014, 36, 451, 470, 1068, 40, 1261, 42, 946, 1020, 639, 46, 1832, 336 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..47.

FORMULA

Sum_{d|n, d<n} d^2*phi(n/d). - Vladeta Jovovic, Aug 27 2003

CROSSREFS

Cf. A069097.

Sequence in context: A127320 A098917 A054786 * A133936 A065350 A063427

Adjacent sequences:  A033454 A033455 A033456 * A033458 A033459 A033460

KEYWORD

nonn

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified September 17 17:29 EDT 2014. Contains 246866 sequences.