Numbers m such that the product of m and the string m in reverse contains m as a substring.

Terms

a(0) =0a(1) =1a(2) =5a(3) =6a(4) =10a(5) =47a(6) =50a(7) =60a(8) =75a(9) =78a(10) =100a(11) =125a(12) =152a(13) =457a(14) =500a(15) =600a(16) =750a(17) =1000a(18) =1025a(19) =1052a(20) =1250a(21) =1520a(22) =5000a(23) =5625a(24) =6000a(25) =7500a(26) =10000a(27) =10025a(28) =10052a(29) =10250