From the given ,you may see:
first term = 19 * 1
second term = 19 *5
third term=19*6
fourth term =19*35
fifth term =19*216
sixth term =19*7595
Notice that all terms = 19*k,and that the multiplied numbers by 19 in any two consecutive terms are relatively prime ,therefore:
the 1995th term = 19*k
the 1996th term = 19*p
GCD(k,q) = 1 therefore their gcd = 19
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