# A148324 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 5 4 14 5 41 6 136 7 453 8 1625 9 5916 10 22413 11 86262 12 341145 13 1364600 14 5575554 15 22970257 16 96219317 17 405776643 18 1733558159 19 7449181815 20 32339997454 21 141107551277 22 620848468901 23 2743496180912 24 12207546137457 25 54524169872592 26 244949648545018 27 1104077076016340 28 5001154826725525