34505

Appears in sequences

• a(n) = A027113(n, 2n).at n=12A027118
• a(n) = 5*(3*n+1)*(9*n+8)/2 (n>=0).at n=22A304508
• Expansion of (1/x) * Series_Reversion( x * (1-x^3/(1-x))^2 ).at n=14A369011