This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A105386 #11 Jan 07 2022 19:32:04 %S A105386 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 %N A105386 Morse code alphabet where "." = 0 and "-" = 1, binary converted to decimal. %C A105386 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 %H A105386 Omniglot, <a href="http://www.omniglot.com/writing/morsecode.htm">Morse Code</a> %e A105386 a(3) = 'C' = "-.-." -> 1010 (binary) = 10. %o A105386 (PARI) A105386=[fromdigits([d-1|d<-digits(t,3)],2)|t<-A059852] \\ _M. F. Hasler_, Jun 23 2020 %Y A105386 Cf. A105387, A059852 (Morse alphabet), A000120 (binary weight), A008777 (number of dots and dashes in Morse code for n-th letter). %K A105386 full,nonn,fini %O A105386 1,2 %A A105386 Bryan Jacobs (bryanjj(AT)gmail.com), Apr 02 2005 %E A105386 Name and crossrefs edited by _M. F. Hasler_, Jun 23 2020