0,3
"Nineteen" is one word, while "twenty-one" is not.
Sequence in context: A178157 A175782 A051108 * A110303 A180493 A084981
Adjacent sequences: A051104 A051105 A051106 * A051108 A051109 A051110
nonn,word
Robert Lozyniak (11(AT)onna.com)