Structured tetragonal anti-prism numbers.

Terms

a(0) =1a(1) =8a(2) =28a(3) =68a(4) =135a(5) =236a(6) =378a(7) =568a(8) =813a(9) =1120a(10) =1496a(11) =1948a(12) =2483a(13) =3108a(14) =3830a(15) =4656a(16) =5593a(17) =6648a(18) =7828a(19) =9140a(20) =10591a(21) =12188a(22) =13938a(23) =15848a(24) =17925a(25) =20176a(26) =22608a(27) =25228a(28) =28043a(29) =31060