# A024948 (b-file synthesized from sequence entry) 1 1 2 1 3 4 4 7 5 10 6 22 7 46 8 88 9 175 10 343 11 820 12 1693 13 3448 14 7399 15 16807 16 36322 17 76609 18 166144 19 378730 20 831706 21 1796773 22 3959785 23 9004330 24 20002942 25 43959124 26 97356997 27 223477834 28 500128180 29 1109072953 30 2483239909 31 5696350633 32 12837653710 33 28703742610