60508

Appears in sequences

• a(n) = round(n*phi^20), where phi is the golden ratio, A001622.at n=4A004955
• a(n) = ceiling(n*phi^20), where phi is the golden ratio, A001622.at n=4A004975
• Number of terms of the fractional part of A001203 for which the geometric mean produces increasingly better approximations to Khinchin's constant.at n=18A059101
• 4 times the Lucas number A000032(n).at n=20A156279
• G.f.: Product_{n>=1} (1 - Lucas(n)*x^n + (-x^2)^n) / (1 + Lucas(n)*x^n + (-x^2)^n) where Lucas(n) = A000204(n).at n=52A203850
• Number of (n+1)X(4+1) 0..3 arrays with nondecreasing x(i,j)-x(i,j-1) in the i direction and nondecreasing absolute value of x(i,j)-x(i-1,j) in the j direction.at n=1A250687
• T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with nondecreasing x(i,j)-x(i,j-1) in the i direction and nondecreasing absolute value of x(i,j)-x(i-1,j) in the j direction.at n=11A250691
• Number of (2+1)X(n+1) 0..3 arrays with nondecreasing x(i,j)-x(i,j-1) in the i direction and nondecreasing absolute value of x(i,j)-x(i-1,j) in the j direction.at n=3A250693
• Number of overpal-free binary words of length n.at n=39A277277