# A088032 (b-file synthesized from sequence entry) 1 3 2 3 3 9 4 3 5 33 6 31 7 129 8 31 9 513 10 511 11 2049 12 1023 13 8193 14 8191 15 32769 16 4095 17 131073 18 131071 19 524289 20 262143 21 2097153 22 2097151 23 8388609 24 2097151