60640

Appears in sequences

• Concatenation of n, n+1, n+2 divided by 3.at n=18A074991
• Count of the first 10^n primes which do not contain the digit 5.at n=5A228417
• Number of length-4 0..n arrays with no following elements greater than or equal to the first repeated value.at n=14A267233
• The numbers k for which gcd(k, phi(k)) + gcd(k, tau(k)) = gcd(k, sigma(k)).at n=8A326416
• Number of compositions of n matching the pattern (1,2,1).at n=17A335470
• a(0)=1; a(1)=1; for n>1, a(n) = a(n-1) + 3*n*a(n-2).at n=8A351531