44755domain: NAppears in sequencesG.f. satisfies: A(x) = 1/(1 + x*A(x^3)) and also the continued fraction: 1+x*A(x^4) = [1;1/x,1/x^3,1/x^9,1/x^27,...,1/x^(3^(n-1)),...].at n=30A101913Number of products of factorials not exceeding n!.at n=26A101976Semiprimes whose decimal representation has only digits in {4,5,7}.at n=39A217124