6526885

Appears in sequences

• Pythagorean spiral: a(n-1), a(n)-1 and a(n) are sides of a right triangle.at n=5A053630
• a(1)=3, a(n_even)=(a(n-1)^2-1)/2; a(n_odd)=a(n-1)+1.at n=10A076601
• Starting with a(0)=5, a(n) = smallest squarefree number k such that, for all a(m) with m<n, k+a(m) is not squarefree.at n=29A080797