50790

Appears in sequences

• Number of walks within N^2 (the first quadrant of Z^2) starting and ending at (0,0) and consisting of n steps taken from {(-1, -1), (-1, 1), (0, 1), (1, 0)}.at n=14A151339
• Number of -n..n arrays x(0..3) of 4 elements with sum zero and with zeroth through 3rd differences all nonzero.at n=21A200040
• Expansion of Product_{i>=1, j>=1} (1 + x^(i*j) + x^(2*i*j)).at n=26A329805