# A013399 (b-file synthesized from sequence entry) 0 -1 1 -7 2 -47 3 2809 4 506893 5 83115485 6 16337883105 7 3980912553745 8 1198885514196949 9 441311715413932261 10 196017910100566581641 11 103733615818680354449241 12 64634094120174715384992573