301301

Appears in sequences

• Decimal expansion of a(n) is given by the first n terms of the periodic sequence with initial period 3,0,1.at n=5A037652
• a(n) = (1/6) * 2^(-n) * n! * [x^n] Exp(2*x, 1)*(Exp(2*x, 3) - 1), where Exp(x, m) = Sum_{k>=0} (x^k / k!)^m.at n=13A344559
• a(n) = Sum_{k=0..floor(n/2)} binomial(n+k-1,k) * binomial(3*k,n-2*k).at n=11A389293