# A148789 (b-file synthesized from sequence entry) 0 1 1 1 2 3 3 8 4 25 5 77 6 252 7 848 8 2894 9 10064 10 35290 11 125487 12 450179 13 1626087 14 5916476 15 21633851 16 79579418 17 294022842 18 1090624361 19 4061006824 20 15168490711 21 56843270546 22 213593833242 23 804616157278 24 3038263114399 25 11496594775537 26 43593624433215 27 165604694730541 28 630191189599674 29 2402056664402975