# A180668 (b-file synthesized from sequence entry) 0 0 1 0 2 1 3 5 4 14 5 32 6 67 7 133 8 256 9 484 10 905 11 1681 12 3110 13 5740 14 10579 15 19481 16 35856 17 65976 18 121377 19 223277 20 410702 21 755432 22 1389491 23 2555709 24 4700720 25 8646012 26 15902537 27 29249369 28 53798022 29 98950036 30 181997539 31 334745713