64255

Appears in sequences

• a(n) = Product_{k=1..(n-1)/2} 1 + 4*cos(k*Pi/n)^2 + 16*cos(k*Pi/n)^4 + 64*cos(k*Pi/n)^6 + 256*cos(k*Pi/n)^8.at n=9A152122
• Collatz trajectory starting at 35655.at n=25A161023
• Sum of first n squares of semiprimes.at n=27A217736
• -5-Knödel numbers.at n=38A225509
• Decimal representation of the x-axis, from the origin to the right edge, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 291", based on the 5-celled von Neumann neighborhood.at n=15A280568
• Numbers n such that there is k < n for which A003557(k) = A003557(n), A048250(k) = A048250(n) and A173557(k) = A173557(n).at n=11A296087