Triangular numbers whose digit permutations yield at least two further triangular numbers.

Terms

a(0) =120a(1) =210a(2) =1035a(3) =2080a(4) =4095a(5) =4560a(6) =4950a(7) =5460a(8) =9045a(9) =13530a(10) =15400a(11) =17020a(12) =17205a(13) =17578a(14) =19306a(15) =20100a(16) =20503a(17) =20706a(18) =23005a(19) =30135a(20) =30628a(21) =36046a(22) =37401a(23) =40186a(24) =43071a(25) =43660a(26) =46360a(27) =46971a(28) =50721a(29) =51040