A109376 - OEIS

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A109376

Numbers k such that k * (sum of the digits of k raised to their own power) + 1 is prime and sets a new record for number of digits.

0

1, 11, 20, 33, 35, 36, 75, 79, 390, 1991, 9199, 91899, 699949, 5299999, 39999999, 428999999, 3699949999

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OFFSET

1,2

LINKS

Table of n, a(n) for n=1..17.

CROSSREFS

Sequence in context: A011753 A120442 A059407 * A100038 A370917 A160843

Adjacent sequences: A109373 A109374 A109375 * A109377 A109378 A109379

KEYWORD

base,more,nonn

AUTHOR

Jason Earls, Aug 25 2005

EXTENSIONS

a(15) from Owen Whitby, Sep 11 2013

a(16)-a(17) from Michael S. Branicky, May 02 2024

STATUS

approved