# A098135 (b-file synthesized from sequence entry) 0 1 1 5 2 9 3 455 4 2618 5 315 6 271700 7 56751695 8 6930 9 3708514810 10 32152414840 11 135135 12 19749267715100 13 314645828225300 14 34918884 15 113543477411038675 16 473930651619825400 17 669278610 18 467655703593591713200