2687489281

Appears in sequences

• a(n) and floor(a(n)/5) are both squares; i.e., squares which remain squares when written in base 5 and last digit is removed.at n=17A055812
• Expansion of (5-14*x+x^2)/((1-x)*(x^2-18*x+1)).at n=7A115032
• Sin(arcsin(n)- 3 arccos(n))^2.at n=9A239609