Main diagonal of the Stolarsky array.

Terms

a(0) =1a(1) =6a(2) =18a(3) =39a(4) =81a(5) =157a(6) =309a(7) =576a(8) =1042a(9) =1885a(10) =3338a(11) =6011a(12) =10569a(13) =18321a(14) =31851a(15) =55717a(16) =95320a(17) =163580a(18) =278208a(19) =478807a(20) =814329a(21) =1374926a(22) =2328359a(23) =3963782a(24) =6656320a(25) =11209356a(26) =18772741a(27) =31524784a(28) =53186481a(29) =88750072