Starting from generation 5 add previous and next term yielding generation 6.

Terms

a(0) =56a(1) =127a(2) =181a(3) =276a(4) =339a(5) =453a(6) =540a(7) =656a(8) =780a(9) =888a(10) =1036a(11) =1146a(12) =1290a(13) =1420a(14) =1550a(15) =1704a(16) =1826a(17) =1984a(18) =2112a(19) =2254a(20) =2404a(21) =2542a(22) =2708a(23) =2856a(24) =3014a(25) =3160a(26) =3300a(27) =3460a(28) =3588a(29) =3806