15036840domain: NAppears in sequencesTriangle of coefficients c(n,i), 1<=i<=n, such that for each n>=2, c(n,i) are setwise coprime; and for all primes p>2n-1, the sum of (-1)^i*c(n,i)*binomial(i*p,p) is divisible by p^(2n-1).at n=46A268512a(n) is the smallest number with exactly n divisors that are n-gonal numbers.at n=10A358539