In TeXForm#
TeXForm parses this entry as a character leaf mapped to U+266F (MUSIC SHARP SIGN).
See also#
\backslashbase\lnotbase\negbase
The ♯ symbol (Music sharp sign, U+266F), written as \sharp in LaTeX math mode.
TeXForm parses this entry as a character leaf mapped to U+266F (MUSIC SHARP SIGN).
\backslash base\lnot base\neg base