# A120895 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 5 4 12 5 30 6 78 7 206 8 552 9 1498 10 4105 11 11340 12 31541 13 88237 14 248076 15 700478 16 1985397 17 5646129 18 16104378 19 46056513 20 132031176 21 379315946 22 1091890772 23 3148736064 24 9095091878 25 26310816944 26 76219704957 27 221085782559 28 642058752476 29 1866693825362 30 5432795508417