# A245306 (b-file synthesized from sequence entry) 0 1 1 2 2 2 3 5 4 10 5 26 6 65 7 170 8 442 9 1157 10 3026 11 7922 12 20737 13 54290 14 142130 15 372101 16 974170 17 2550410 18 6677057 19 17480762 20 45765226 21 119814917 22 313679522 23 821223650 24 2149991425 25 5628750626 26 14736260450 27 38580030725 28 101003831722 29 264431464442 30 692290561601