# A057972 (b-file synthesized from sequence entry) 3 3 4 31 5 252 6 1776 7 11048 8 61106 9 303664 10 1368844 11 5651241 12 21559133 13 76613440 14 255411923 15 803771681 16 2400633464 17 6837010458 18 18644075466 19 48855805143 20 123415815229 21 301386128354 22 713271875603 23 1639572164669 24 3667859207856