# A088921 (b-file synthesized from sequence entry) 1 1 2 2 3 5 4 13 5 33 6 80 7 185 8 411 9 885 10 1862 11 3853 12 7881 13 15993 14 32284 15 64945 16 130359 17 261293 18 523282 19 1047397 20 2095781 21 4192721 22 8386792 23 16775145 24 33552083 25 67106213 26 134214750 27 268432125 28 536867201 29 1073737705 30 2147479092