Palindromic composite numbers starting with a digit 7.

Terms

a(0) =77a(1) =707a(2) =717a(3) =737a(4) =747a(5) =767a(6) =777a(7) =7007a(8) =7117a(9) =7227a(10) =7337a(11) =7447a(12) =7557a(13) =7667a(14) =7777a(15) =7887a(16) =7997a(17) =70007a(18) =70107a(19) =70307a(20) =70407a(21) =70707a(22) =70807a(23) =70907a(24) =71017a(25) =71117a(26) =71217a(27) =71417a(28) =71517a(29) =71617