28771549

Properties

Appears in sequences

• Expansion of (1 - x)*(1 + 2*x) / ((1 + x)*(1 - 4*x - x^2)).at n=12A102129
• a(n) = a(n-2) - 2a(n-3) + a(n-4) for n>3, with a(0)=2, a(1)=0, a(2)=1, a(3)=-1, a sequence related to Pellian numbers.at n=38A292521
• Lower midsequence of the Fibonacci numbers (1,2,3,5,8,...) and Lucas numbers (1,3,4,7,11,...); see Comments.at n=35A355324
• Prime numbersat n=1786393