# A216521 (b-file synthesized from sequence entry) 1 3 2 15 3 21 4 33 5 39 6 57 7 105 8 129 9 147 10 159 11 183 12 231 13 237 14 273 15 303 16 399 17 501 18 633 19 735 20 903 21 1029 22 1041 23 1083 24 1113