# A336678 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 3 4 6 5 10 6 20 7 35 8 70 9 126 10 252 11 461 12 922 13 1702 14 3404 15 6315 16 12630 17 23494 18 46988 19 87533 20 175066 21 326382 22 652764 23 1217483 24 2434966 25 4542526 26 9085052 27 16950573 28 33901146 29 63255670 30 126511340 31 236063915 32 472127830 33 880983606 34 1761967212 35 3287837741