Centered cube numbers: a(n) = (n+1)^9 + n^9.

Terms

a(0) =1a(1) =513a(2) =20195a(3) =281827a(4) =2215269a(5) =12030821a(6) =50431303a(7) =174571335a(8) =521638217a(9) =1387420489a(10) =3357947691a(11) =7517728043a(12) =15764279725a(13) =31265546157a(14) =59104406159a(15) =107162836111a(16) =187307353233a(17) =316947166865