# A171254 (b-file synthesized from sequence entry) 1 3 2 5 3 7 4 17 5 19 6 31 7 67 8 79 9 127 10 4099 11 4111 12 4159 13 8191 14 65537 15 65539 16 65551 17 65599 18 131071 19 262147 20 266239 21 524287 22 1073741827 23 1073741839 24 1073807359 25 2147483647 26 2305843009213693951 27 309485009821345068724785151