1,1

A308803(2n+1) >= (2*10^n-1)(5*10^n+1) for all n. This sequence lists the values of n where this lower bound is attained.

Table of n, a(n) for n=1..34.

Cf. A308803

Sequence in context: A065159 A240265 A051956 * A032826 A190709 A166732

Adjacent sequences: A308980 A308981 A308982 * A308984 A308985 A308986

nonn,base,more

Chai Wah Wu, Sep 30 2019

a(14)-a(34) from Chai Wah Wu, Oct 03 2019

approved