# A083401 (b-file synthesized from sequence entry) 1 3 2 4 3 5 4 6 5 15 6 21 7 25 8 27 9 28 10 52 11 70 12 205 13 245 14 308 15 339 16 357 17 415 18 524 19 537 20 1455 21 1500