a(n) = smallest palindrome > a(n-1) (for n > 0) such that the sum of its prime digits is equal to palindrome with index n, or -1 if none exists.

A114996

a(n) = smallest palindrome > a(n-1) (for n > 0) such that the sum of its prime digits is equal to palindrome with index n, or -1 if none exists.

Terms

    a(0) =0a(1) =-1a(2) =2a(3) =3a(4) =22a(5) =151a(6) =222a(7) =232a(8) =323a(9) =333a(10) =353a(11) =37273a(12) =77577a(13) =7772777a(14) =377777773a(15) =5777777775a(16) =77777777777

External references