OFFSET
1,2
LINKS
Alois P. Heinz, Table of n, a(n) for n = 1..10000 (first 1000 terms from Harvey P. Dale)
MATHEMATICA
lnm[n_]:=Module[{m=1}, While[!MemberQ[{1, 10n}, PowerMod[10, m, 10n+1]], m++]; m]; Array[lnm, 60] (* Harvey P. Dale, Feb 12 2022 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
STATUS
approved