The On-Line Encyclopedia of Integer Sequences (OEIS)

A316864 revision #12

A316864

Number of digits 3 in decimal representation of n.

0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0

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OFFSET

0,34

LINKS

Table of n, a(n) for n=0..104.

EXAMPLE

a(0) = 0 since the decimal representation of 0 has no digit of 3 in it.

a(3) = 1 since the decimal representation of 3 has one digit of 3 in it.

a(3) = 2 since the decimal representation of 33 has two digits of 3 in it.

MATHEMATICA

Array[ DigitCount[#, 10, 3] &, 105, 0]

PROG