# A172318 (b-file synthesized from sequence entry) 0 1 1 2 2 4 3 8 4 16 5 32 6 64 7 128 8 256 9 511 10 1020 11 2036 12 4064 13 8112 14 16192 15 32320 16 64512 17 128768 18 257025 19 513030 20 1024024 21 2043984 22 4079856 23 8143520 24 16254720 25 32444928 26 64761088 27 129265151 28 258017272 29 515010520 30 1027977056