400001

Appears in sequences

• Automorphic numbers: numbers k such that k^6 ends with k. Also m-morphic numbers for all m not congruent to 26 (mod 50) but congruent to 6 (mod 10).at n=45A068408
• a(n) = 4*10^n+1.at n=5A199684
• a(1) = 1; for n > 1: a(n) = smallest odd number greater than a(n-1) which does not use any digit used by a(n-1).at n=39A229364
• Number x = concat(MSD(x),b) such that MSD(x)*b = d(x), where MSD(x) is the Most Significant Digit of x and d(x) is the number of divisors of x.at n=16A291618