147987domain: NAppears in sequencesNumbers k such that phi(k)/k = 16/29.at n=14A172344Sum of binomial(n,k) over squarefree k.at n=17A245268a(n) = 3^n*Bell(n).at n=6A247452Square array A(n,k), n >= 0, k >= 0, read by antidiagonals, where column k is the expansion of e.g.f. exp(exp(k*x)-1).at n=51A292913