Numbers k such that k^2+k+5 is a palindrome.

Terms

a(0) =0a(1) =1a(2) =2a(3) =8a(4) =12a(5) =26a(6) =74a(7) =127a(8) =224a(9) =230a(10) =2751a(11) =3462a(12) =4012a(13) =4067a(14) =12752a(15) =22424a(16) =27548a(17) =28168a(18) =105322a(19) =107422a(20) =2358150a(21) =2724718a(22) =2775383a(23) =4063892a(24) =7569245a(25) =85125933a(26) =87579753a(27) =106617617a(28) =2237334999a(29) =2426472519