Main diagonal of array in A082191.

Terms

a(0) =1a(1) =8a(2) =18a(3) =42a(4) =66a(5) =96a(6) =108a(7) =129a(8) =177a(9) =228a(10) =261a(11) =327a(12) =381a(13) =417a(14) =471a(15) =561a(16) =669a(17) =753a(18) =852a(19) =936a(20) =1041a(21) =1137a(22) =1254a(23) =1383a(24) =1503a(25) =1623a(26) =1731a(27) =1857a(28) =1989a(29) =2148