119571

Appears in sequences

• Number of unrooted triangulations of a pentagon with n internal nodes.at n=7A005501
• Array T(n,k) read by antidiagonals: T(n,k) is the number of [n,k]-triangulations in the plane, n >= 0, k >= 0.at n=52A169808
• Partial sums of floor(3^n/10)/2.at n=12A178828
• Numbers k such that the sum of the prime distinct divisors of k^2+1 equals 2 times the largest prime divisor of k^2+1.at n=10A200072