107421875

Appears in sequences

• a(n) = Sum_{k=0..n} (k+1) * T(n,k), with T given by A026374.at n=20A026950
• a(n) = n*5^(n-1).at n=11A053464
• 5th binomial transform of (0,0,1,0,0,0, ...).at n=11A081135
• a(n) = 5^(n-1)*n*(n+1)/2.at n=10A084902
• a(0)=1; a(1)=5; a(2)=11; a(n)=a(1)*a(n-1).at n=12A141496
• a(n) = (2*n+1)*25^n.at n=5A166725
• 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=43A305837