# A013350 (b-file synthesized from sequence entry) 0 1 1 0 2 0 3 -40 4 -896 5 -62304 6 -5050496 7 -734950528 8 -138858307584 9 -35484086513152 10 -11376927751841792 11 -4526992734620571648 12 -2178753470207843827712 13 -1249669173876982577029120