Starting from generation 6 add previous and next term yielding generation 7.

Terms

a(0) =127a(1) =237a(2) =403a(3) =520a(4) =729a(5) =879a(6) =1109a(7) =1320a(8) =1544a(9) =1816a(10) =2034a(11) =2326a(12) =2566a(13) =2840a(14) =3124a(15) =3376a(16) =3688a(17) =3938a(18) =4238a(19) =4516a(20) =4796a(21) =5112a(22) =5398a(23) =5722a(24) =6016a(25) =6314a(26) =6620a(27) =6888a(28) =7266a(29) =7510