1,2

Robert Israel, Table of n, a(n) for n = 1..9693

a(n) = log_4(A067482(n)).

6 is in the sequence because 4^6 = 4096 starts with 4.

select(t -> 4^t >= 4*10^ilog10(4^t) and 4^t < 5*10^ilog10(4^t), [$1..1000]); # Robert Israel, May 18 2014

Cf. A067482.

Sequence in context: A140232 A315467 A315468 * A315469 A315470 A184487

Adjacent sequences: A242591 A242592 A242593 * A242595 A242596 A242597

nonn,base

Robert Israel, May 18 2014

approved