# A018146 (b-file synthesized from sequence entry) 0 1 1 2 2 3 3 5 4 7 5 11 6 18 7 29 8 47 9 75 10 121 11 196 12 316 13 511 14 824 15 1331 16 2151 17 3474 18 5611 19 9064 20 14641 21 23651 22 38206 23 61718 24 99698 25 161051 26 260161 27 420263 28 678890 29 1096675 30 1771561 31 2861770 32 4622887 33 7467784