Numbers n such that the digits of P_7(n), the n-th heptagonal number, end in n.

Terms

a(0) =1a(1) =4a(2) =5a(3) =8a(4) =9a(5) =16a(6) =25a(7) =40a(8) =41a(9) =56a(10) =65a(11) =80a(12) =81a(13) =96a(14) =176a(15) =225a(16) =400a(17) =401a(18) =576a(19) =625a(20) =800a(21) =801a(22) =976a(23) =1376a(24) =2625a(25) =4000a(26) =4001a(27) =5376a(28) =6625a(29) =8000