173747domain: NAppears in sequencesAntidiagonal sums of the convolution array A213590.at n=14A213557Least semiprime of a run of exactly n odd semiprimes.at n=20A304457G.f.: Sum_{n>=0} x^n * ((1+x)^n + 2*i)^n / (1 + 2*i*x*(1+x)^n)^(n+1), where i^2 = -1.at n=9A323684