55617

Appears in sequences

• Denominators of continued fraction convergents to sqrt(643).at n=10A042235
• Number of permutations satisfying -k<=p(i)-i<=r and p(i)-i not in I, i=1..n, with k=2, r=3, I={1,2}.at n=20A080003
• Expansion of Product_{k>=1} 1/(1 - x^k/(1 + x)^k).at n=18A320590
• Fundamental positive solution y(n) of the Diophantine equation x^2 - A045339(n)*y^2 = -2, for n >= 1.at n=32A339882