/etc/texmf/dvi2dvi/a2n is in dvi2dvi 2.0alpha-9.2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 | # ASCII dvi -> NTT dvi (subfont)
#
# configuration
fontdesc config$kpse
# min,goth -> dm,dg
fontdesc fonts$kpse/a2n
|