Nexus numbers (n+1)^6 - n^6.

Terms

a(0) =1a(1) =63a(2) =665a(3) =3367a(4) =11529a(5) =31031a(6) =70993a(7) =144495a(8) =269297a(9) =468559a(10) =771561a(11) =1214423a(12) =1840825a(13) =2702727a(14) =3861089a(15) =5386591a(16) =7360353a(17) =9874655a(18) =13033657a(19) =16954119a(20) =21766121a(21) =27613783a(22) =34655985a(23) =43067087a(24) =53037649a(25) =64775151a(26) =78504713a(27) =94469815a(28) =112933017a(29) =134176679