356283

Appears in sequences

• a(n) is the number of integer strings s(0),...,s(n) counted by array T in A026374 that have s(n)=2; also a(n) = T(2n,n-1).at n=8A026376
• Triangle read by rows: T(n,k) is the number of Schroeder paths of length 2n and having k peaks at even height.at n=46A101895
• Riordan array (1/sqrt(1-6x+5x^2),(1-3x-sqrt(1-6x+5x^2))/(2x)).at n=46A110165