31389448217domain: NAppears in sequencesExpansion of (1 - 2*x - 2*x^2)/((1 - 2*x)*(1 - 3*x)).at n=23A085279Smallest prime of the form p^n + q^n + r^n, where p,q,r are primes.at n=22A123601Primes of the form 2^k+3^(k-1).at n=12A153133a(n) = 3^(n+1) + 2*(-2)^(n+1).at n=21A369490