# A268619 (b-file synthesized from sequence entry) 1 2 2 1 3 2 4 4 5 10 6 25 7 70 8 200 9 600 10 1845 11 5830 12 18772 13 61542 14 204659 15 689410 16 2347920 17 8074762 18 28009524 19 97909318 20 344615860 21 1220539390 22 4347310451 23 15564141262 24 55985418344 25 202256970300 26 733607281875 27 2670698800548 28 9755982857964 29 35751803209918 30 131405090455065 31 484316704740126 32 1789672012052256