7th diagonal of triangle in A059317.

Terms

a(0) =0a(1) =0a(2) =0a(3) =0a(4) =1a(5) =13a(6) =72a(7) =255a(8) =691a(9) =1574a(10) =3177a(11) =5867a(12) =10121a(13) =16543a(14) =25882a(15) =39051a(16) =57147a(17) =81472a(18) =113555a(19) =155175a(20) =208385a(21) =275537a(22) =359308a(23) =462727a(24) =589203a(25) =742554a(26) =927037a(27) =1147379a(28) =1408809a(29) =1717091