402644992

Appears in sequences

• Sum of 2^n, ..., 2^(n+1) - 1.at n=14A010036
• Expansion of x*(1+5*x)/((1+2*x+1)*(1-4*x)).at n=15A117110
• Duplicate of A136488.at n=28A135098
• a(n) = 4*a(n-1) - 6*a(n-2) + 4*a(n-3) for n > 4, with first terms 1, 2, 4, 7.at n=29A135360
• a(n) = 2^n - A005418(n).at n=28A136488