2516582

Appears in sequences

• a(1) = a(2) = 1, a(2n + 1) = 2*a(2n) and a(2n) = 2*a(2n - 1) + (-1)^n.at n=22A016029
• Base 4 digits are, in order, the first n terms of the periodic sequence with initial period 2,1.at n=10A037489
• Expansion of (1-x^2)/((1-2*x)*(1+x^2)).at n=22A100088
• a(n) = 3*a(n-1) + 4*a(n-2), with a(0)=1, a(1)=2.at n=11A122117
• Decimal representation of the middle column of the "Rule 147" elementary cellular automaton starting with a single ON (black) cell.at n=21A262864
• Numbers n such that ror(n) + rol(n) is a power of 2, where ror(n)=A038572(n) is n rotated one binary place to the right, rol(n)=A006257(n) is n rotated one binary place to the left.at n=16A273180