# A103387 (b-file synthesized from sequence entry) 1 2 2 3 3 5 4 7 5 17 6 31 7 71 8 127 9 157 10 227 11 257 12 293 13 349 14 419 15 503 16 16007 17 32783 18 33329 19 80429 20 220919 21 786433 22 878831 23 85790399 24 10666238497 25 394760836573 26 22265159019759079 27 617347651958903360669 28 98459899570803393815965301