Semiprimes (A001358) whose digit reversal is a square.

Terms

a(0) =4a(1) =9a(2) =10a(3) =46a(4) =94a(5) =121a(6) =169a(7) =526a(8) =961a(9) =982a(10) =1042a(11) =1273a(12) =1405a(13) =1843a(14) =4069a(15) =4633a(16) =5221a(17) =6313a(18) =6511a(19) =6937a(20) =9235a(21) =9481a(22) =9886a(23) =10201a(24) =10609a(25) =12538a(26) =12769a(27) =14023a(28) =16171a(29) =16327