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A095217 Greatest prime divisor of n-th partial concatenation is prime(n). 0
2, 7, 795302832777615 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..3.

EXAMPLE

Greatest prime divisor of 27795302832777615 which is a concatenation of first four terms 2,7,795302832777615 is prime(3) = 5, 27795302832777615= 3^33*5.

CROSSREFS

Cf. A095216.

Sequence in context: A077548 A050809 A246516 * A230915 A242922 A242530

Adjacent sequences:  A095214 A095215 A095216 * A095218 A095219 A095220

KEYWORD

base,more,nonn,bref

AUTHOR

Amarnath Murthy, Jun 10 2004

STATUS

approved

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Last modified January 18 06:34 EST 2019. Contains 319269 sequences. (Running on oeis4.)