# A013159 (b-file synthesized from sequence entry) 0 0 1 2 2 -1 3 -12 4 42 5 436 6 -4170 7 -32704 8 751016 9 3283072 10 -209162880 11 86913024 12 81648502848 13 -575015877024 14 -41409311392176 15 689874309603456 16 25412078270229120 17 -812967446932685568 18 -17148064731893670528