# A224514 (b-file synthesized from sequence entry) 0 1 1 2 2 6 3 20 4 70 5 251 6 911 7 3327 8 12190 9 44744 10 164407 11 604487 12 2223504 13 8181175 14 30108147 15 110820165 16 407946421 17 1501844193 18 5529362694 19 20358557249 20 74961030414 21 276017648570 22 1016360893036 23 3742540945813 24 13781324308298 25 50748099850042