30083

Appears in sequences

• Minimal peaks in digital expansions of Pi: positions of peaks equal to 1.at n=32A105275
• a(n) = 81*n^2 - 118*n + 43.at n=20A156677
• Semiprimes of the form p*q where p < q such that q divides p^(q+1) + 1 and (q-p)^(q+1) + 1.at n=14A278921
• G.f. satisfies A(x) = 1 + x*A(x)^2/(1 - x^3*A(x)^3).at n=10A364833
• The indices k where A377015(k) = 1.at n=3A377928