# A182137 (b-file synthesized from sequence entry) 1 1 2 3 3 6 4 13 5 28 6 56 7 115 8 237 9 474 10 960 11 1920 12 3870 13 7825 14 15650 15 31473 16 63422 17 126844 18 254649 19 509298 20 1021248 21 2050541 22 4101082 23 8219801 24 16490635 25 32981270 26 66071490 27 132455435 28 264910870 29 530485275 30 1060970550 31 2123841570 32 4253619813 33 8507239626 34 17027951548 35 34095896991 36 68191793982 37 136471574881 38 272943149762 39 546144278026 40 1093108792776 41 2186217585552