# A006908 (b-file synthesized from sequence entry) 1 1 2 4 3 8 4 21 5 39 6 92 7 170 8 331 9 593 10 1176 11 2118 12 3699 13 6658 14 11347 15 19760 16 32746 17 54854 18 90245 19 149906 20 237953 21 387937 22 608531 23 970912 24 1510331 25 2380015 26 3610620 27 5634251 28 8474110 29 12934092 30 19440955 31 29291690 32 43233800 33 64825830 34 94779612 35 139820232