25163776

Appears in sequences

• Sum of 2^n, ..., 2^(n+1) - 1.at n=12A010036
• Relates row sums of Pascal's triangle to expansion of cos(x)/exp(x).at n=24A100216
• Expansion of x*(1+5*x)/((1+2*x+1)*(1-4*x)).at n=13A117110
• Duplicate of A136488.at n=24A135098
• a(n) = 2^n - A005418(n).at n=24A136488