100827

Appears in sequences

• a(n) = T(2n,n+3), T given by A026725.at n=7A026843
• Number of stereoisomers of acyclic hydrocarbons with n carbon atoms.at n=10A036672
• a(n) is obtained by applying the map k -> composite(k) n times, starting at n.at n=47A280327
• Numbers k such that (746*10^k + 1)/9 is prime.at n=24A282458
• a(n) = [x^n] 2/(3*x + sqrt((1 - 3*x)*(x + 1)) + 1).at n=16A344507