# A247618 (b-file synthesized from sequence entry) 0 1 1 5 2 17 3 45 4 105 5 229 6 481 7 989 8 2009 9 4053 10 8145 11 16333 12 32713 13 65477 14 131009 15 262077 16 524217 17 1048501 18 2097073 19 4194221 20 8388521 21 16777125 22 33554337 23 67108765 24 134217625 25 268435349 26 536870801 27 1073741709 28 2147483529 29 4294967173 30 8589934465