268443648

Appears in sequences

• a(n) = (2^n + 2^[ n/2 ] )/2.at n=27A001445
• Expansion of g.f.: x*(4-7*x+2*x^2-8*x^4+16*x^5-16*x^6)/((1-2*x) * (1-2*x^2) * (1-2*x+2*x^2) * (1+2*x^2)).at n=27A100213
• Expansion of (4 - 7*x + 2*x^2)/((1-2*x)*(1 - 2*x + 2*x^2)).at n=27A100215
• a(n) = 2^(2n) + 2^(n-1).at n=13A164051