# A005621 (b-file synthesized from sequence entry) 1 1 2 4 3 6 4 7 5 9 6 13 7 21 8 46 9 71 10 109 11 168 12 265 13 417 14 562 15 1051 16 1677 17 2484 18 4053 19 6601 20 10738 21 17979 22 28997 23 46800 24 75573 25 120697 26 197306 27 318939 28 515665 29 830216 30 1343949 31 2181261 32 3528334 33 5698111 34 9233541 35 14938080