# A027912 (b-file synthesized from sequence entry) 2 1 3 5 4 28 5 156 6 880 7 5005 8 28665 9 165104 10 955434 11 5550755 12 32355917 13 189147400 14 1108476720 15 6510243495 16 38308997100 17 225810489168 18 1333057076890