69504

Appears in sequences

• Theta series of lattice Kappa_8.at n=21A015235
• Expansion of x*(1+4*x-4*x^2)/((1+2*x)*(1-6*x)*(1-8*x^2)).at n=6A095897
• Table with g.f. [1-x*n-sqrt(x^2*n^2-2*n*x+1+4*x^2-4*x)]/(2*x).at n=61A128888
• a(n) = number of steps required to reach 0 from F(n+2) by repeatedly subtracting from a natural number the number of ones in its Zeckendorf representation. Here F(n) = the n-th Fibonacci number, F(0) = 0, F(1) = 1, F(2) = 1, F(3) = 2, ...at n=27A261082
• a(n) = Sum_{k=1..n} binomial(floor(n/k)+4,5).at n=21A365439