143006

Appears in sequences

• Fourth column of A046741.at n=31A062124
• Least number that is the start of a gap of size n between numbers that are either prime or twice a prime (A001751).at n=46A290572
• a(1) = 1; a(n+1) = Sum_{k=1..n} a(k) * ceiling(n/k).at n=14A332846