# A279882 (b-file synthesized from sequence entry) 1 7 2 15 3 63 4 255 5 4095 6 16383 7 262143 8 1048575 9 16777215 10 1073741823 11 4294967295 12 274877906943 13 4398046511103 14 17592186044415 15 281474976710655 16 18014398509481983 17 1152921504606846975 18 4611686018427387903 19 295147905179352825855 20 4722366482869645213695