# A081533 (b-file synthesized from sequence entry) 1 1 2 3 3 7 4 12 5 31 6 28 7 127 8 60 9 91 10 124 11 2047 12 168 13 8191 14 508 15 403 16 360 17 131071 18 546 19 524287 20 744 21 1651 22 8188 23 8388607 24 1170 25 3751 26 32764 27 2821 28 3048 29 536870911 30 2418 31 2147483647 32 2880 33 26611 34 524284 35 15367 36 4368 37 137438953471 38 2097148 39 106483