# A148488 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 6 4 21 5 73 6 272 7 1054 8 4214 9 17226 10 71623 11 302252 12 1292432 13 5581926 14 24319777 15 106774166 16 471860548 17 2097325988 18 9369510453 19 42044499840 20 189429350786 21 856534717875 22 3885495872594 23 17677575370337 24 80641091022357 25 368762780681781 26 1690078200540330 27 7761698620206097 28 35713157961834317