# A054173 (b-file synthesized from sequence entry) 0 0 1 0 2 1 3 1 4 4 5 5 6 10 7 18 8 35 9 65 10 120 11 225 12 430 13 814 14 1549 15 2981 16 5739 17 11084 18 21474 19 41663 20 81033 21 157830 22 307912 23 601482 24 1176314 25 2302911 26 4513106 27 8851907 28 17376317 29 34134944 30 67101922 31 131990741 32 259779732 33 511566355 34 1007901666