Palindromes of the form 6n + 1 where n is also a palindrome. palindromes arising in A083835.

Terms

a(0) =7a(1) =55a(2) =595a(3) =727a(4) =787a(5) =5995a(6) =59995a(7) =72127a(8) =72727a(9) =78187a(10) =78787a(11) =599995a(12) =5999995a(13) =7212127a(14) =7218127a(15) =7272727a(16) =7278727a(17) =7812187a(18) =7818187a(19) =7872787a(20) =7878787a(21) =59999995a(22) =599999995a(23) =721212127a(24) =721272127a(25) =721818127a(26) =721878127a(27) =727212727