# A370306 (b-file synthesized from sequence entry) 0 1 1 2 2 7 3 24 4 70 5 198 6 532 7 1370 8 3418 9 8296 10 19677 11 45770 12 104687 13 235972 14 525136 15 1155516 16 2517199 17 5434454 18 11638099 19 24741812 20 52250956 21 109678746 22 228948036 23 475479494 24 982831024 25 2022696684 26 4145947065 27 8466032502 28 17226979885 29 34939008232 30 70643799296 31 142423352600