114840

Appears in sequences

• Molecular topological indices of the Moebius ladders.at n=32A192833
• a(n) = 2^n*floor(n/2)!*Gamma(ceiling((n+1)/2),-1/4)*exp(-1/4).at n=8A277374
• a(n) = A353749(sigma(A003961(n))), where A353749(k) = phi(k) * A064989(k), and A064989 shifts the prime factorization one step towards lower primes, while A003961 shifts the factorization one step towards higher primes.at n=35A353790
• a(n) = A353791(sigma(A003961(n))), where A353791(n) = A003958(n) * A064989(n).at n=35A353794
• Number of ways to place a non-attacking black king and white king on an n X n board, up to rotation and reflection.at n=31A357723
• Numbers x such that there exist three integers 0<x<=y<=z and t>0 such that sigma(x)^2 = sigma(y)^2 = sigma(z)^2 = x^2 + y^2 + z^2 + t^2.at n=38A385531
• Numbers whose sum of prime divisors equals the sum of square divisors.at n=33A390397