209718

Appears in sequences

• a(n) = 3*a(n-1) + 4*a(n-2), with a(0) = 2, a(1) = 6, a(2) = 10.at n=9A115113
• Expansion of 1/(1 - 4*x^2/(1-x))^(3/2).at n=13A377204