479349

Appears in sequences

• Lerch's function q_2(n) = (2^{phi(t)} - 1)/t where t = 2*n - 1.at n=17A001226
• Numbers 2*k+1 for which numbers A006694(k) are record values for A006694.at n=46A139208
• a(n) = floor((-1 + 4^n)/(-1 + 3*n)).at n=11A191638