# A100739 (b-file synthesized from sequence entry) 0 1 1 5 2 35 3 175 4 1295 5 6475 6 45325 7 226625 8 1679615 9 8398075 10 58786525 11 293932625 12 2175101425 13 10875507125 14 76128549875 15 380642749375 16 2821109907455 17 14105549537275 18 98738846760925 19 493694233804625 20 3653337330154225