6613425domain: NAppears in sequencesa(n) = binomial(n+4,4) * binomial(n+9,4).at n=11A104678Odd numbers k such that k and phi(k) have the same number of divisors.at n=22A116518Denominators of constants A(a) related to the asymptotic LCM of arithmetic progressions a*n+b (a and b coprime).at n=21A249226