# A227620 (b-file synthesized from sequence entry) 1 1 2 1 3 4 4 5 5 11 6 22 7 36 8 69 9 121 10 221 11 386 12 686 13 1210 14 2122 15 3734 16 6517 17 11408 18 19903 19 34714 20 60485 21 105312 22 183272 23 318758 24 554262 25 963361 26 1674076 27 2908426 28 5052066 29 8774386 30 15237482 31 26458718 32 45939797 33 79759442 34 138468656 35 240382216 36 417289619 37 724369536 38 1257396992