a(n) = n^4 - n^2 + 1.

Terms

a(0) =1a(1) =1a(2) =13a(3) =73a(4) =241a(5) =601a(6) =1261a(7) =2353a(8) =4033a(9) =6481a(10) =9901a(11) =14521a(12) =20593a(13) =28393a(14) =38221a(15) =50401a(16) =65281a(17) =83233a(18) =104653a(19) =129961a(20) =159601a(21) =194041a(22) =233773a(23) =279313a(24) =331201a(25) =390001a(26) =456301a(27) =530713a(28) =613873a(29) =706441