69167

Appears in sequences

• 5x - 1 sequence starting at 19 (a(n+1) = a(n)/2 if a(n) is even, or 5*a(n)-1 if a(n) is odd).at n=28A037238
• a(n) = 4*n^4 + 8*n^3 - 4*n - 1 = (2*n^2 - 1)*(2*n^2 + 4*n + 1).at n=11A057769
• Records in A065925.at n=33A065927
• Number of compositions of n into parts 1, 7, and 8.at n=43A276106
• Odd squarefree numbers n > 1 such that lambda(n)^2 = phi(n), where lambda is the Carmichael lambda function and phi is Euler's totient function.at n=38A276980