1,6

a(7)=5 because (-3)^2-1-1-1-1=5

F[x_] := F[x - 1]^2 - F[x - 2] - F[x - 3] - F[x - 4] - F[x - 5]; F[1] = F[2] = F[3] = F[4] = F[5] = 1

Sequence in context: A009002 A119882 A074701 this_sequence A101611 A069060 A103526

Adjacent sequences: A140124 A140125 A140126 this_sequence A140128 A140129 A140130

sign

Ben Branman (137ben(AT)comcast.net), Jun 21 2008