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A045589 Numbers k that divide 10^k + 3^k. 1
1, 13, 169, 1703, 2197, 22139, 28561, 76739, 223093, 287807, 371293, 447889, 994747, 997607, 2399293, 2900209, 3741491, 4826809, 5802121, 5822557, 10052809, 12931711, 12968891, 29225183, 31190809, 37702717, 48639383, 58673459, 62748517, 75427573, 75693241, 117794807 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
LINKS
MATHEMATICA
Select[Range[10^5], Divisible[PowerMod[10, #, #] + PowerMod[3, #, #], #] &] (* Amiram Eldar, Oct 23 2021 *)
CROSSREFS
Cf. A245806.
Sequence in context: A207084 A207178 A188749 * A245228 A093151 A188869
KEYWORD
nonn
AUTHOR
EXTENSIONS
a(28)-a(32) from Amiram Eldar, Oct 23 2021
STATUS
approved

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Last modified March 28 13:42 EDT 2024. Contains 371254 sequences. (Running on oeis4.)