585937500

Appears in sequences

• a(n) = Sum_{k=0..n} (k+1) * T(n,k), with T given by A026374.at n=22A026950
• a(n) = n*5^(n-1).at n=12A053464
• a(n) = (n/4)*5^(n/2)*((1+sqrt(5))^2+(-1)^n*(1-sqrt(5))^2).at n=20A187275
• a(n) = 12*5^n.at n=11A216491
• 3 X 3 X 3 triangular graph without horizontal edges coloring a rectangular array: number of n X 1 0..5 arrays where 0..5 label nodes of a graph with edges 0,1 0,2 1,3 1,4 2,4 2,5 and every array movement to a horizontal or vertical neighbor moves along an edge of this graph.at n=23A223346
• Numbers k whose smallest multiple that is a Fibonacci number is Fibonacci(k).at n=24A289586
• Hypotenuses for which there exist exactly 11 distinct integer triangles.at n=9A290501