# A330693 (b-file synthesized from sequence entry) 1 1 2 3 3 4 4 16 5 36 6 64 7 218 8 1104 9 2112 10 4096 11 9608 12 90416 13 266496 14 528384 15 1048576 16 1540944 17 30194176 18 135032832 19 269500416 20 537919488 21 1073741824