489872

Appears in sequences

• First differences of A002002.at n=7A035028
• Convolution of A055853 with A011782.at n=10A055854
• Number of horizontal segments in all Schroeder paths of length 2n (a horizontal segment is a maximal string of horizontal steps).at n=8A104550
• Nonnegative integers m such that 18*m*(m+1)+1 is a square.at n=8A222393
• Number of paths from (0,0) to the line x = n, each segment given by a vector (1,1), (1,-1), or (2,0), not crossing the x-axis, and including no horizontal segment on the x-axis.at n=17A247630