A105386 - OEIS

A105386

Morse code alphabet where "." = 0 and "-" = 1, binary converted to decimal.

1, 8, 10, 4, 0, 2, 6, 0, 0, 7, 5, 4, 3, 2, 7, 6, 13, 2, 0, 1, 1, 1, 3, 9, 11, 12

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

COMMENTS

Hamming weight A000120(a(n)) gives number of dashes in the Morse code of the n-th letter. A008777 allows us to know how many leading zeros a term should have. A059852 is a better (unambiguous) variant. - M. F. Hasler, Jun 23 2020

LINKS

Table of n, a(n) for n=1..26.

Omniglot, Morse Code

EXAMPLE

a(3) = 'C' = "-.-." -> 1010 (binary) = 10.

PROG

(PARI) A105386=[fromdigits([d-1|d<-digits(t, 3)], 2)|t<-A059852] \\ M. F. Hasler, Jun 23 2020

CROSSREFS

Cf. A105387, A059852 (Morse alphabet), A000120 (binary weight), A008777 (number of dots and dashes in Morse code for n-th letter).

Sequence in context: A229196 A227571 A112590 * A124685 A105021 A343212

Adjacent sequences: A105383 A105384 A105385 * A105387 A105388 A105389

KEYWORD

full,nonn,fini

AUTHOR

Bryan Jacobs (bryanjj(AT)gmail.com), Apr 02 2005

EXTENSIONS

Name and crossrefs edited by M. F. Hasler, Jun 23 2020

STATUS

approved