Inverted (definition in A075193) generalized tribonacci numbers A001644.

Terms

a(0) =1a(1) =1a(2) =-5a(3) =5a(4) =1a(5) =-11a(6) =15a(7) =-3a(8) =-23a(9) =41a(10) =-21a(11) =-43a(12) =105a(13) =-83a(14) =-65a(15) =253a(16) =-271a(17) =-47a(18) =571a(19) =-795a(20) =177a(21) =1189a(22) =-2161a(23) =1149a(24) =2201a(25) =-5511a(26) =4459a(27) =3253a(28) =-13223a(29) =14429