626349396

Appears in sequences

• a(n) = (7*2^n - 4(-1)^n)/3.at n=28A083595
• a(n) = (7*4^n - 4)/3.at n=14A083597
• Expansion of (1+3x)/((1-x)(1-4x^2)).at n=28A097164
• a(1)=1, a(n) = a(n-1) + (p-1)*p^(n/2-1) if n is even, else a(n) = a(n-1) + p^((n-1)/2), where p=4.at n=28A133628
• a(n) = (3*2^(n+1) - 8 - (-2)^n)/6.at n=28A176961
• Expansion of (1+2*x+3*x^2-x^3)/((1-x)*(1+x)*(1-2*x)*(1+2*x)).at n=28A221049