# A001568 (b-file synthesized from sequence entry) 1 1 2 -1 3 -1 4 2 5 49 6 629 7 6961 8 38366 9 -1899687 10 -133065253 11 -6482111309 12 -281940658286 13 -10702380933551 14 -247708227641863 15 14512103549430397 16 3377044611825908414 17 433180638973276282801 18 47474992085447610990231