A122464 - OEIS

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A122464

Smooth Power Trios: a(n) is the largest of three successive numbers a(n)-j, j=0..2, such that the largest prime factor of a(n)-j is <= the n-th root of a(n)-j.

4, 50, 134850, 116026275, 138982583000, 1348770149848002

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OFFSET

1,1

COMMENTS

The fifth term was found by R. Gerbicz, the others were found by F. Schneider.

LINKS

Table of n, a(n) for n=1..6.

Fred Schneider and R. Gerbicz, Smooth Power Trios.

EXAMPLE

Example for n=6:

1348770149848002 = 2 x 3 x 7 x 23 x 41 x 61^2 x 149 x 239 x 257,