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A103755 Number of contiguous digits i in the counting numbers, for i=1. 0
1, 1, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 2, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Write the natural numbers as an infinite sequence of digits, starting at the left; and count the digits of each group of "1"'s you encounter (the smallest "groups" have one "1").

LINKS

Table of n, a(n) for n=1..105.

EXAMPLE

a(1)=1: the first "1" of the counting numbers, isolated.

a(2)=1: the second "1", first digit of number 10, isolated.

a(3)=3 two "1"'s of 11 and one "1" of 12 = three "1"'s, the next group of "1"'s.

CROSSREFS

Sequence in context: A260196 A094404 A103756 * A326538 A333844 A317933

Adjacent sequences:  A103752 A103753 A103754 * A103756 A103757 A103758

KEYWORD

base,easy,nonn

AUTHOR

Alexandre Wajnberg, Mar 28 2005

STATUS

approved

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Last modified February 26 14:39 EST 2021. Contains 341632 sequences. (Running on oeis4.)