81902

Appears in sequences

• Number of nonzero palindromes < 10^n and containing at least one digit '1'.at n=9A050684
• a(n+3) = 3*a(n+2) - 2*a(n+1) + 1 with a(0)=1, a(1)=5.at n=14A094002
• Expansion of (1-3*x+6*x^2-3*x^3)/((1-x)^2*(1-2*x)).at n=15A188589