260608

Appears in sequences

• arctan(arctan(x)*tan(x))=2/2!*x^2-80/6!*x^6-2688/8!*x^8+260608/10!*x^10...at n=5A012447
• Sum of odd divisors of n < sqrt(n) = sum of even divisors of n < sqrt(n).at n=21A033832
• Sum of the squares modulo 2^n of the odd numbers less than 2^n.at n=9A187468
• 10-step Fibonacci sequence starting with 0,0,0,0,0,0,0,0,1,0.at n=28A251759
• Number of active (ON, black) cells at stage 2^n-1 of the two-dimensional cellular automaton defined by "Rule 245", based on the 5-celled von Neumann neighborhood.at n=8A271005
• Decimal representation of the diagonal from the origin to the corner of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 790", based on the 5-celled von Neumann neighborhood.at n=17A290419
• Numbers k such that sigma(k) = psi(k) + phi(k) + omega(k).at n=4A390049