Diagonal sums of number array A082110.

Terms

a(0) =1a(1) =2a(2) =9a(3) =32a(4) =89a(5) =210a(6) =441a(7) =848a(8) =1521a(9) =2578a(10) =4169a(11) =6480a(12) =9737a(13) =14210a(14) =20217a(15) =28128a(16) =38369a(17) =51426a(18) =67849a(19) =88256a(20) =113337a(21) =143858a(22) =180665a(23) =224688a(24) =276945a(25) =338546a(26) =410697a(27) =494704a(28) =591977a(29) =704034