# A012904 (b-file synthesized from sequence entry) 0 0 1 2 2 -1 3 11 4 -30 5 215 6 -1095 7 9200 8 -67060 9 676565 10 -6364125 11 75816050 12 -870716550 13 12014125175 14 -162677426275 15 2556597056000 16 -39838813521000 17 703292880031625 18 -12389158068197625 19 242880759376082750