907578

Appears in sequences

• Triangle whose (i,j)-th entry is binomial(i,j)*7^(i-j)*9^j.at n=22A038275
• Triangle whose (i,j)-th entry is binomial(i,j)*9^(i-j)*7^j.at n=26A038297
• Sixth column of triangle A075502.at n=3A075925
• a(0)=1, a(n)= n^(n-2)(7n^2-3n+2)/6 (n>0).at n=7A081917