6291452

Appears in sequences

• Binomial transform of [1, 1, 5, 1, 5, 1, 5, ...].at n=21A131128
• a(n) is one fourth of the total number of free ends of 4 line segments expansion at n iterations (see Comments lines for definition).at n=41A238549
• Expansion of x*(1 - x + 4*x^2) / ((1 - x)*(1 - 2*x)).at n=22A296954
• a(n) is the number of times that only 2 pegs have disks on them during the optimal solution to a Towers of Hanoi problem with n disks.at n=41A347789