# A084241 (b-file synthesized from sequence entry) 0 0 1 1 2 -5 3 21 4 -85 5 341 6 -1365 7 5461 8 -21845 9 87381 10 -349525 11 1398101 12 -5592405 13 22369621 14 -89478485 15 357913941 16 -1431655765 17 5726623061 18 -22906492245 19 91625968981 20 -366503875925 21 1466015503701 22 -5864062014805 23 23456248059221 24 -93824992236885