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A046274 Largest prime substring in 8^n (0 if none). 2
0, 0, 0, 5, 409, 7, 2621, 971, 1677721, 1342177, 107, 89, 6871947673, 54975581, 4398046511, 883, 28147497671, 2251799813, 180143985094819, 1518807585587, 46068469, 3685477, 629483, 9029581035870565171, 472236648286964521369 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

LINKS

Table of n, a(n) for n=0..24.

CROSSREFS

Cf. A046266.

Sequence in context: A128866 A221047 A075769 * A221700 A216089 A201887

Adjacent sequences:  A046271 A046272 A046273 * A046275 A046276 A046277

KEYWORD

nonn

AUTHOR

Patrick De Geest, Jun 15 1998

STATUS

approved

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Last modified January 22 19:16 EST 2020. Contains 331153 sequences. (Running on oeis4.)