# A354167 (b-file synthesized from sequence entry) 1 3 2 5 3 13 4 31 5 61 6 127 7 2203 8 4253 9 9941 10 19937 11 23209 12 86243 13 110503 14 132049 15 756839 16 1398269 17 2976221 18 3021377 19 6972593 20 13466917 21 20996011 22 25964951 23 37156667 24 43112609 25 77232917