3011157

Appears in sequences

• a(n) = Sum_{k=0..n} C(n-k,3k).at n=27A003522
• Expansion of x/(1 - 2*x^2 - x^3 + x^4).at n=40A122514
• p-INVERT of (1,1,1,1,1,...), where p(S) = 1 - S^3 - S^4.at n=20A290998