4200411

Appears in sequences

• Number of paths in the plane x >= 0 and y >= -2, from (0,0) to (n,0), and consisting of steps U = (1,1), D = (1,-1) and H = (1,0).at n=16A026325
• a(n) is the sum of squares of numbers in row n of array T given by A026323.at n=8A027314