6172882716
domain: N
Appears in sequences
- Palindromic triangular numbers.at n=28A003098
- Sum_{i=1..(10^n - 1)/9} i, or ((10^n -1)/9)*((10^n -1)/9 +1)/2 (n-th term is the middle 2(n-1) digits of the (n+9)-th term for n > 1).at n=5A003555
- Palindromic hexagonal numbers.at n=16A054969
- Largest n-digit palindromic triangular number, or 0 if no such number exists.at n=9A068643
- a(1) = 1; a(n) = smallest multiple of a(n-1) which is a palindromic triangular number.at n=5A069502
- Duplicate of A003555.at n=5A099639
- Palindromic triangular number with palindromic index.at n=8A229236
- Smallest number m such that m and reverse(m) each have exactly n distinct prime factors.at n=8A239696
- Smallest palindrome with exactly n distinct prime factors.at n=9A335645