Squares of triangular numbers, written backwards.

Terms

a(0) =1a(1) =9a(2) =63a(3) =1a(4) =522a(5) =144a(6) =487a(7) =6921a(8) =5202a(9) =5203a(10) =6534a(11) =4806a(12) =1828a(13) =52011a(14) =441a(15) =69481a(16) =90432a(17) =14292a(18) =163a(19) =144a(20) =16335a(21) =90046a(22) =67167a(23) =9a(24) =526501a(25) =102321a(26) =488241a(27) =638461a(28) =522981a(29) =522612