# A127581 (b-file synthesized from sequence entry) 0 2 1 3 2 7 3 23 4 31 5 127 6 127 7 383 8 1279 9 3583 10 5119 11 6143 12 8191 13 73727 14 81919 15 131071 16 131071 17 524287 18 524287 19 14680063 20 14680063 21 14680063 22 109051903 23 109051903 24 654311423 25 738197503 26 738197503 27 2147483647 28 2147483647 29 2147483647