1131732

Appears in sequences

• Numbers k such that k divided by ((sum of digits of k) multiplied by (product of digits of k)) is prime.at n=14A066042
• Regular triangle read by rows: T(n, k) = sum(i=0, n, sum(j=k, n, 3*(-1)^(k+j)*binomial(2*k,k)*binomial(j,i)*binomial(n,i)*binomial(i,n-j)/(2*(2*i-1)*(2*j+1)*(2*n-2*i-1)))).at n=43A262886