# A248155 (b-file synthesized from sequence entry) 0 1 1 -2 2 3 3 -5 4 9 5 -17 6 33 7 -65 8 129 9 -257 10 513 11 -1025 12 2049 13 -4097 14 8193 15 -16385 16 32769 17 -65537 18 131073 19 -262145 20 524289 21 -1048577 22 2097153 23 -4194305 24 8388609 25 -16777217 26 33554433 27 -67108865 28 134217729 29 -268435457 30 536870913