15379115

Appears in sequences

• An inverse Catalan transform of J(2n).at n=21A100335
• a(n) = a(n-1) + 4*a(n-2) - 4*a(n-3) for n>3.at n=24A136336
• a(n) = (11*4^n + 1)/3.at n=11A199210
• a(0) = 4, a(n) = 2*a(n-1) + (-1)^n.at n=22A383953