# A228322 (b-file synthesized from sequence entry) 1 15 2 56 3 232 4 1008 5 4432 6 19328 7 82944 8 349952 9 1454848 10 5978112 11 24352768 12 98594816 13 397479936 14 1597865984 15 6411452416 16 25695289344 17 102901940224 18 411899002880 19 1648290693120 20 6594803793920 21 26383058206720 22 105541162500096 23 422185252421632