Main diagonal of A332354.

Terms

a(0) =1a(1) =5a(2) =15a(3) =33a(4) =71a(5) =125a(6) =227a(7) =361a(8) =567a(9) =821a(10) =1219a(11) =1697a(12) =2311a(13) =3021a(14) =4019a(15) =5161a(16) =6591a(17) =8197a(18) =10219a(19) =12465a(20) =15111a(21) =18013a(22) =21651a(23) =25625a(24) =30143a(25) =35029a(26) =40955a(27) =47345a(28) =54559a(29) =62285