655356

Appears in sequences

• a(n) = T(4,n), array T given by A048483.at n=17A048487
• Start with 1, then alternately add 2 or double.at n=34A123208
• 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=34A238549
• Expansion of (x - x^2 + 2*x^3 + 2*x^4)/(1 - 3*x + 2*x^2).at n=19A270810