# A148662 (b-file synthesized from sequence entry) 0 1 1 1 2 3 3 6 4 25 5 69 6 297 7 919 8 4209 9 14330 10 66413 11 237589 12 1127925 13 4224288 14 20166864 15 77647110 16 375206178 17 1483748803 18 7192465521 19 28949796874 20 141317035936 21 578798473432 22 2831000009495 23 11738326687294 24 57666232555593 25 242042851859253 26 1190667232643237 27 5042932509993216 28 24879899873021542