# A012235 (b-file synthesized from sequence entry) 0 1 1 -1 2 17 3 -281 4 24257 5 -1331441 6 275798481 7 -33388170825 8 12274116245249 9 -2689107736315873 10 1507045832586910737 11 -530866838718138680441 12 415346005609060387325633 13 -217242204344672574488013521