This cannot be shown because it is not true. The 29th term will be double the 19th.
The 19th term of the sequence is 16.
It's an term which applies to the work of late 19th- and 20th-century philosophers.
double
The term is diploid.
unemployment
Westward expansion
double entendre
Just Double
The term for double vision is Diplopia.
Rutherford B. Hayes was the 19th president, served his term 1877-1881 with William A. Wheeler as his vice president.
It has been suggested by Merriam Webster the dictionary compilers that the term Toxicosis has its origins in the 19th century.
Woodrow Wilson was the 28th President of the United States serving from 1913-1921. His first term was nicknamed 'New Freedom'.