# A288231 (b-file synthesized from sequence entry) 0 1 1 3 2 5 3 9 4 18 5 36 6 71 7 138 8 268 9 522 10 1017 11 1981 12 3859 13 7517 14 14642 15 28521 16 55557 17 108223 18 210814 19 410654 20 799931 21 1558224 22 3035341 23 5912689 24 11517614 25 22435718 26 43703622 27 85132404 28 165833537 29 323035186 30 629255898 31 1225758065 32 2387713549 33 4651142959