1000012

Appears in sequences

• Numbers written in base of triangular numbers.at n=32A000462
• Positive numbers k such that k and 2*k are anagrams of each other in base 3 (k is written here in base 3).at n=15A023058
• Lexicographically earliest strictly increasing base 5 autovarious sequence: a(n) = number of distinct a(k) mod 5^n (written in base 5).at n=29A038114
• Lexicographically earliest strictly increasing base 6 autovarious sequence: a(n) = number of distinct a(k) mod 6^n (written in base 6).at n=22A038115
• Suburban numbers: without b, r, s or u.at n=43A072955
• a(n) = 10^n+2*n.at n=6A173835
• a(n) = the smallest n-digit number with exactly 12 divisors, a(n) = 0 if no such number exists.at n=6A182683
• Numbers n such that sum of decimal digits of n equals number of prime divisors of n counted with multiplicity and sum of distinct decimal digits of n equals number of distinct primes dividing n.at n=31A280911
• 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=18A291618
• Smallest decimal number containing n palindromic substrings (Version 2). See Comments for precise definition.at n=13A361336