121129

Appears in sequences

• Lucky numbers that are decimal concatenations of n with n + 8.at n=4A032658
• a(n) = least k >= 1 such that the remainder when 6^k is divided by k is n.at n=6A127816
• Least k such that n^k mod k = n + 1.at n=4A128172
• Numbers n such that A045876(n) = A045876(n+1).at n=26A276758
• Numerators of the partial sums of the reciprocals of the sum of unitary divisors function (A034448).at n=16A379513