485237

Appears in sequences

• Squarefree numbers (A005117) with prime factors in a prime(k) + k progression.at n=26A232169
• Squarefree numbers (A005117) of form prime(k)*q where q = primes of the form prime(k) + k.at n=25A232170
• Numbers k such that (k, k+2) are not twin primes yet sigma(k+2)/d(k+2) - sigma(k)/d(k) = 1.at n=8A322668
• Numbers k such that k and k+2 have the same deficiency (A033879).at n=8A330901
• Odd numbers k such that phi(k) = phi(k+2), where phi is the Euler totient function (A000010).at n=24A333741
• Numbers k such that k and k+2 have the same unitary abundance (A129468).at n=26A335252
• G.f. A(x) satisfies A(x) = (1 + x*A(x) / (1+x))^6.at n=6A371541