Centered cube numbers: (n+1)^7 + n^7.

Terms

a(0) =1a(1) =129a(2) =2315a(3) =18571a(4) =94509a(5) =358061a(6) =1103479a(7) =2920695a(8) =6880121a(9) =14782969a(10) =29487171a(11) =55318979a(12) =98580325a(13) =168162021a(14) =276272879a(15) =439294831a(16) =678774129a(17) =1022558705a(18) =1506091771a(19) =2173871739a(20) =3081088541a(21) =4295446429a(22) =5899183335a(23) =7991296871a(24) =10689987049a(25) =14135325801