2012500

Appears in sequences

• Row sums of Riordan array ((1-3x+x^2)/(1-4x+3x^2), x(1-2x)/(1-4x+3x^2)).at n=12A147748
• Number of paths of length n starting at initial node of the path graph P_9.at n=24A178381
• a(n) = Sum_{k>=0} (-1)^k*binomial(n, 5*k+2).at n=24A289387