4203927

Appears in sequences

• Number of Twopins positions.at n=38A005689
• Diagonal sums of the triangular matrix A190088.at n=14A190090
• p-INVERT of (1,0,0,1,0,0,1,0,0,...), where p(S) = (1 - S^2).at n=43A289918
• Expansion of (1 - x + x^3)/((1 - x + x^3)^2 - 4*x^3).at n=21A376717