80741domain: NAppears in sequencesn-th 6k+1 prime times n-th 6k-1 prime.at n=28A048629Number of dissimilar ternary squarefree words of length n+1.at n=38A060688G.f. A(x) satisfies: x = Sum_{n>=1} x^n * (1+x)^(n^2/2) / A(x)^(n/2).at n=12A325155