81918

Appears in sequences

• Base 10 palindromes that start with 8.at n=41A043043
• a(n) = 5*2^n - 2.at n=14A051633
• Numbers n such that n and pi(n) (A000720) are palindromic.at n=33A103357
• Number of palindromes (in base 4) below 4^n.at n=14A117863
• Start with 1, then alternately add 2 or double.at n=29A123208
• a(n) = 5*2^(n-2) - 2 for n > 1, with a(1) = 1.at n=15A131051
• Row sums of triangle A134061.at n=14A134062
• a(n) is the smallest even k >= 2 such that the first n multiples of k have the same sum of digits, but (n + 1)*k has a different one. a(n) = 0 if no such k exists.at n=24A237994
• a(n) is the smallest k > 0 such that the first n multiples of k have the same sum of digits, but (n+1)k has a different one. a(n)=0 if no such k exists.at n=24A238088
• a(n) is the smallest decimal palindrome with Hamming weight n (i.e., with exactly n 1's when written in binary).at n=14A354480