48130

Appears in sequences

• Number of (1,0)-steps at levels 0,2,4,... in all peakless Motzkin paths of length n.at n=14A190166
• Number of (n+1)X(n+1) 0..2 arrays with every 2X2 subblock having nonzero determinant and commuting with every horizontal or vertical neighbor.at n=11A207141
• G.f. satisfies A(x) such that: -1 = Sum_{n=-oo..+oo} (-1)^n * x^(2*n+1) * (1 + x^n)^(n+1) * A(x)^n.at n=9A380557