# A064294 (b-file synthesized from sequence entry) 1 1 2 4 3 5 4 16 5 31 6 64 7 131 8 222 9 403 10 770 11 1409 12 2652 13 4825 14 9078 15 16773 16 30768 17 56827 18 99734 19 181653 20 328002 21 588583 22 1032996 23 1787013 24 3220128 25 5771203 26 10201340 27 18394609 28 32144188 29 58055311 30 101762018 31 173367175 32 302844912 33 511518279 34 904032692