# A068031 (b-file synthesized from sequence entry) 0 1 1 1 2 1 3 1 4 2 5 4 6 7 7 13 8 26 9 52 10 104 11 206 12 410 13 820 14 1640 15 3280 16 6556 17 13108 18 26216 19 52432 20 104864 21 209720 22 419432 23 838864 24 1677728 25 3355456 26 6710896 27 13421776 28 26843552 29 53687104 30 107374208 31 214748384 32 429496736 33 858993472 34 1717986944