# A074860 (b-file synthesized from sequence entry) 0 1 1 1 2 1 3 3 4 5 5 9 6 17 7 31 8 111 9 195 10 319 11 1021 12 2525 13 4639 14 11092 15 25708 16 64083 17 173846 18 292644 19 979061 20 2073724 21 2680995 22 7115676 23 17380240 24 30136219 25 41109707 26 136581181 27 298634398 28 550610143 29 1625232666 30 2859685613 31 9863026929 32 19691221772 33 32153295043