Centered cube numbers: a(n) = (n+1)^8+n^8.

Terms

a(0) =1a(1) =257a(2) =6817a(3) =72097a(4) =456161a(5) =2070241a(6) =7444417a(7) =22542017a(8) =59823937a(9) =143046721a(10) =314358881a(11) =644340577a(12) =1245712417a(13) =2291519777a(14) =4038679681a(15) =6857857921a(16) =11270724737a(17) =17995718017a(18) =28003523617a(19) =42583563041