# A127120 (b-file synthesized from sequence entry) 0 1 1 3 2 12 3 41 4 140 5 457 6 1485 7 4732 8 14986 9 47025 10 146784 11 455683 12 1409122 13 4341456 14 13336440 15 40858875 16 124894889 17 380993722 18 1160145321 19 3527008680 20 10707133507 21 32461710583 22 98300107420 23 297348593017 24 898559807247 25 2712889137261 26 8183743165156 27 24668014337837