n+sigma(n)+sigma(sigma(n)) is a palindrome.

Terms

a(0) =1a(1) =2a(2) =15a(3) =24a(4) =25a(5) =29a(6) =43a(7) =46a(8) =57a(9) =65a(10) =95a(11) =119a(12) =121a(13) =157a(14) =173a(15) =531a(16) =1791a(17) =2072a(18) =2080a(19) =2169a(20) =2200a(21) =2205a(22) =2267a(23) =2411a(24) =2413a(25) =2444a(26) =2483a(27) =2553a(28) =2590a(29) =2623