1312500

Appears in sequences

• Triangle of coefficients in expansion of (1+5x)^n.at n=51A013612
• Triangle whose (i,j)-th entry is 5^(i-j)*binomial(i,j).at n=48A038243
• Triangle whose (i,j)-th entry is binomial(i,j)*5^(i-j)*12^j.at n=29A038254
• Triangle whose (i,j)-th entry is binomial(i,j)*12^(i-j)*5^j.at n=34A038331
• Triangular array T(n,k) read by rows, giving number of labeled free trees such that the root is smaller than all its children, with respect to the number n of vertices and to the size k of the subtree rooted at the vertex labeled by 1.at n=37A071209
• 5th binomial transform of (0,0,0,1,0,0,0,0,......).at n=9A081143
• Smallest number having exactly n divisors that are contained in its decimal representation.at n=17A155005
• Number of 4-step one or two collinear space at a time queen's tours on an n X n board summed over all starting positions.at n=21A187029
• Triangle read by rows: T(0,0) = 1; T(n,k) = 5*T(n-1,k) + T(n-2,k-1) for k = 0..floor(n/2); T(n,k)=0 for n or k < 0.at n=45A305837
• Number T(n,k) of endofunctions on [n] with exactly k fixed points, all of which are isolated; triangle T(n,k), n>=0, 0<=k<=n, read by rows.at n=48A349454