# A280997 (b-file synthesized from sequence entry) 1 13 2 37 3 41 4 67 5 97 6 131 7 193 8 577 9 1033 10 1153 11 2053 12 4129 13 8209 14 18433 15 32771 16 32801 17 32833 18 65539 19 133121 20 525313 21 557057 22 1049089 23 4194433 24 167772161 25 268435459