3170893824

Appears in sequences

• a(1) = 1; a(n) is the smallest multiple of a(n-1) not divisible by 10 which is greater than the digit reversal of a(n-1). In case R(a(n-1)) < a(n-1) then a(n) = 2*a(n-1).at n=24A076086
• Denominator of series coefficients for Archimedes' spiral which transforms into Galileo's spiral.at n=7A202408