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A078318
Sum of divisors of n*rad(n)+1, where rad=A007947 (squarefree kernel).
5
3, 6, 18, 13, 42, 38, 93, 18, 56, 102, 186, 74, 324, 198, 342, 48, 540, 110, 546, 272, 756, 588, 972, 180, 312, 678, 126, 528, 1266, 972, 1596, 84, 1980, 1260, 1842, 256, 2484, 1842, 2286, 402, 2613, 2124, 3534, 1440, 1281, 2220, 4536, 307, 660, 672
OFFSET
1,1
COMMENTS
a(n)=A000203(A078310(n)).
LINKS
PROG
(PARI) rad(n)=vecprod(factor(n)[, 1])
a(n)=sigma(n*rad(n)+1) \\ Charles R Greathouse IV, Jul 09 2013
(Haskell)
a078318 = a000203 . a078310 -- Reinhard Zumkeller, Jul 23 2013
CROSSREFS
KEYWORD
nonn
AUTHOR
Reinhard Zumkeller, Nov 23 2002
STATUS
approved