19627

Appears in sequences

• Starting positions of strings of 3 1's in the decimal expansion of Pi.at n=19A050209
• To get next term, multiply by 17, add 1 and discard any prime factors < 17.at n=14A057216
• To get next term, multiply by 17, add 1 and discard any prime factors < 17.at n=36A057216
• Numerator of Sum_{k=1..n} k^2*H_{n+k} where H_m = Sum_{i=1..m}.at n=5A102720
• The five digits of a(n) and their four successive absolute first differences are all distinct.at n=8A365257