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For n>3, a(n) mod 10 is 0,2 or 8. - Fausto Riccardo Decina, Apr 21 2023
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Conjecture: For n>3, if r=(a(n) mod 10) then r= is 0,2 or 8. - Fausto Riccardo Decina, Apr 21 2023
proposed
editing
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Conjecture: For n>3, if r=(a(n) mod 10) then r=0,2 or 8. - Fausto Riccardo Decina, Apr 21 2023, Apr 21 2023