1,11

Write the natural numbers as an infinite sequence of digits, starting at the left; and count the digits of each group of "0"'s you encounter (the smallest "groups" have one "0").

Table of n, a(n) for n=1..49.

Sequence in context: A194309 A318829 A113515 * A058665 A327103 A290105

Adjacent sequences: A103751 A103752 A103753 * A103755 A103756 A103757

base,easy,nonn

Alexandre Wajnberg, Mar 28 2005

approved