# A018137 (b-file synthesized from sequence entry) 0 1 1 2 2 3 3 4 4 6 5 8 6 13 7 19 8 28 9 43 10 64 11 98 12 148 13 223 14 338 15 512 16 777 17 1177 18 1783 19 2703 20 4096 21 6209 22 9411 23 14264 24 21619 25 32768 26 49668 27 75282 28 114105 29 172951 30 262144 31 397337 32 602249 33 912839 34 1383605 35 2097152