120032

Appears in sequences

• Number of primitive polynomials of degree n over GF(2) (version 2).at n=21A000020
• Number of primitive polynomials of degree n over GF(2).at n=21A011260
• a(n) = phi(4^n-1)/(2*n).at n=10A027742
• Numbers n such that (i) the largest prime factor of n is not a palindrome and (ii) the sum of the factorials of the digits of n is equal to the largest prime factor of n reversed.at n=24A074301
• Let f(k) denote the largest prime factor of k which is not a palindrome. Sequence gives numbers k such that the sum of the factorials of the digits of k is equal to f(k) reversed.at n=25A111185