647495680

Appears in sequences

• Expansion of (1+2*x) / (1-2*x)^4.at n=18A014483
• Sums of the squares of the elements in the subsets of the integers 1 to n.at n=19A087076
• Expansion of x^5*(4 - 5*x)/(1 - 2*x)^4.at n=23A268598