# A012360 (b-file synthesized from sequence entry) 0 1 1 0 2 0 3 0 4 -12 5 60 6 -570 7 3780 8 -26880 9 145152 10 67800 11 -19702320 12 483806664 13 -8808530016 14 143791860576 15 -2098017710880 16 26000312931840 17 -200354333649536 18 -2365679417115840 19 173236427161446528