# A132051 (b-file synthesized from sequence entry) 6 1 7 63 8 2730 9 103950 10 3786615 11 137162025 12 5039703900 13 189883593900 14 7381251402525 15 297032627967075 16 12395985005353950 17 536910000482705850 18 24139951470365605875 19 1126381171697414758125 20 54517938404202375102000