# A201686 (b-file synthesized from sequence entry) 0 -1 1 -1 2 0 3 1 4 4 5 8 6 18 7 33 8 68 9 124 10 250 11 460 12 922 13 1714 14 3430 15 6433 16 12868 17 24308 18 48618 19 92376 20 184754 21 352714 22 705430 23 1352076 24 2704154 25 5200298 26 10400598 27 20058298 28 40116598 29 77558758 30 155117518 31 300540193 32 601080388 33 1166803108 34 2333606218 35 4537567648 36 9075135298 37 17672631898 38 35345263798 39 68923264408 40 137846528818