# A156094 (b-file synthesized from sequence entry) 0 1 1 1 2 31 3 281 4 2101 5 14851 6 102961 7 708761 8 4865911 9 33372361 10 228792301 11 1568309051 12 10749725281 13 73680695281 14 505017569551 15 3461448647801 16 23725139605861 17 162614572159411 18 1114576979567761 19 7639424583421961 20 52361395886149351