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A164946 The value A104017(n) rescaled with its decremented prime factors as described in A162290. 0
295788, 1003244, 2419212, 20140245, 10178892, 35839470, 24413481, 32157228, 295702416, 95828168, 107785924, 353180006543727, 320682950, 457591752, 909143104, 78888524, 735661013336064, 193098816, 26308112, 215405768, 1125114110156250, 3418986808281250, 236301822947449, 269517889, 287152344, 157098832 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

The entry N = A104017(n) is written as the product N = p*q*r*... of its k distinct prime factors p<q<r<... . The (k-2)nd power multiplied by the decremented p-1 of the smallest prime factor and divided by the product of the decremented other prime factors defines a(n):  a(n) = (N-1)^(k-2)*(p-1)/( (q-1)*(r-1)*...). [R. J. Mathar, Dec 16 2010]

LINKS

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

EXAMPLE

The 4 factors of the first member of A104017 (11305) are 5, 7, 17 and 19. Hence the first term of the present sequence is (4*11304^2)/(6*16*18) = 295788.

CROSSREFS

Cf. A104016, A104017, A162290

Sequence in context: A109031 A137817 A137818 * A204318 A204334 A048906

Adjacent sequences:  A164943 A164944 A164945 * A164947 A164948 A164949

KEYWORD

nonn

AUTHOR

A.K. Devaraj, Sep 02 2009

STATUS

approved

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Last modified September 19 03:51 EDT 2014. Contains 246967 sequences.