329893domain: NAppears in sequencesBinomial transform of the sequence of binomial(3n,n).at n=7A188686Base-10 numbers k whose number of divisors equals the number of divisors in R(k), where k is written in all bases from base-2 to base-10 and R(k), the digit reversal of k, is read as a number in the same base.at n=13A346113