Diagonal sums of number array A082046.

Terms

a(0) =1a(1) =2a(2) =7a(3) =24a(4) =69a(5) =170a(6) =371a(7) =736a(8) =1353a(9) =2338a(10) =3839a(11) =6040a(12) =9165a(13) =13482a(14) =19307a(15) =27008a(16) =37009a(17) =49794a(18) =65911a(19) =85976a(20) =110677a(21) =140778a(22) =177123a(23) =220640a(24) =272345a(25) =333346a(26) =404847a(27) =488152a(28) =584669a(29) =695914