# A001569 (b-file synthesized from sequence entry) 0 1 1 -1 2 -1 3 2 4 37 5 329 6 1501 7 -31354 8 -1451967 9 -39284461 10 -737652869 11 560823394 12 1103386777549 13 82520245792997 14 4398448305245905 15 168910341581721494 16 998428794798272641 17 -720450682719825322809 18 -105099789680808769094057 19 -10594247095804692725600734