This is true enough in English, but as everyone reblogging it points out, it is not true of all languages. Some have an A by the second number.
I've got them all beat. In my constructed language Trai'Pahg'Nan'Nog, the first five of ten numbers (they use a base 6 system) all have an A in them:
Ahl, tahl, zahl, kahl, mahl, ors, ahl'ors, tahl'ors, zahl'ors, kahl'ors...
(One, two, three, four, five, ten, eleven, twelve, thirteen, fourteen...)
Though if you use the characters designed for the language, you'll never find the Latin letter A no matter how far you go.