# A094292 (b-file synthesized from sequence entry) 0 0 1 0 2 1 3 3 4 9 5 25 6 68 7 182 8 483 9 1275 10 3355 11 8811 12 23112 13 60580 14 158717 15 415715 16 1088661 17 2850645 18 7463884 19 19541994 20 51163695 21 133951675 22 350695511 23 918141623 24 2403740304 25 6293097000 26 16475579353 27 43133687427 28 112925557953 29 295643107825 30 774003961940