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A167731 Cubes that becomes a prime number when prefixed with a 7. 1
1, 27, 19683, 29791, 35937, 50653, 79507, 132651, 185193, 226981, 912673, 2146689, 2685619, 3442951, 3869893, 4330747, 5929741, 8869743, 10503459, 19902511, 28934443, 33076161, 36926037, 38958219, 42508549, 47045881, 49430863 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Subsequence of cubes of A032670. - Michel Marcus, Jun 22 2016
LINKS
MATHEMATICA
Select[Range[1, 500000, 2]^3, PrimeQ[FromDigits[Join[{7}, IntegerDigits[#]]]] &] (* G. C. Greubel, Jun 21 2016 *)
CROSSREFS
Cf. A032670.
Sequence in context: A263601 A111415 A036534 * A357506 A343692 A201369
KEYWORD
base,nonn
AUTHOR
Claudio Meller, Nov 10 2009
STATUS
approved

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Last modified June 18 21:05 EDT 2024. Contains 373487 sequences. (Running on oeis4.)