A105387 - OEIS

A105387

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

2, 7, 5, 3, 1, 13, 1, 15, 3, 8, 2, 11, 0, 1, 0, 9, 2, 5, 7, 0, 6, 14, 4, 6, 4, 3

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

OFFSET

1,1

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' = "-.-." -> 0101 (binary) = 5.

PROG

(PARI) A105387=[fromdigits([2-d|d<-digits(t, 3)], 2)|t<-A059852] \\ M. F. Hasler, Jun 23 2020

CROSSREFS

Cf. A105386, A059852 (Morse alphabet), A000120 (binary weight), A008777 (number of dots and dashes in Morse code for n-th letter).

Sequence in context: A372773 A296564 A266262 * A011232 A272699 A138344

Adjacent sequences: A105384 A105385 A105386 * A105388 A105389 A105390

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