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A280916 Number of dashes in International Morse numeral representation of n. 5
5, 4, 3, 2, 1, 0, 1, 2, 3, 4, 9, 8, 7, 6, 5, 4, 5, 6, 7, 8, 8, 7, 6, 5, 4, 3, 4, 5, 6, 7, 7, 6, 5, 4, 3, 2, 3, 4, 5, 6, 6, 5, 4, 3, 2, 1, 2, 3, 4, 5, 5, 4, 3, 2, 1, 0, 1, 2, 3, 4, 6, 5, 4, 3, 2, 1, 2, 3, 4, 5, 7, 6, 5, 4, 3, 2, 3, 4, 5, 6, 8, 7, 6, 5, 4, 3, 4, 5, 6, 7, 9, 8, 7, 6, 5, 4, 5, 6, 7, 8, 14, 13, 12, 11, 10, 9, 10, 11, 12, 13 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

COMMENTS

The Morse Code is written in current ITU standard.

LINKS

Indranil Ghosh, Table of n, a(n) for n = 0..10000

Wikipedia, Morse code

Wikipedia, International Telecommunication Union

EXAMPLE

For n = 4, the Morse numeral representation of 4 is "....-" i.e., 1 dash. So, a(4) = 1.

For n = 26, the Morse numeral representation of 26 is "..--- -...." i.e, 4 dashes. So, a(26) = 4.

PROG

(Python)

M={"1":".----", "2":"..---", "3":"...--", "4":"....-", "5":".....", "6":"-....", "7":"--...", "8":"---..", "9":"----.", "0":"-----"}

def a(n):

    s=str(n)

    z=""

    for i in s:

        z+=M[i]+" "

    return z[:-1].count("-")

for i in range(0, 10001):

    print str(a(i))+", ",

CROSSREFS

Cf. A006968, A278182, A280913.

Sequence in context: A021652 A022961 A023447 * A307336 A031016 A261302

Adjacent sequences:  A280913 A280914 A280915 * A280917 A280918 A280919

KEYWORD

nonn,base

AUTHOR

Indranil Ghosh, Jan 10 2017

STATUS

approved

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Last modified January 23 07:07 EST 2020. Contains 331168 sequences. (Running on oeis4.)