Numbers k such that k^2+k+7 is a palindrome.

Terms

a(0) =0a(1) =1a(2) =17a(3) =31a(4) =177a(5) =274a(6) =280a(7) =301a(8) =313a(9) =1777a(10) =2764a(11) =3001a(12) =27259a(13) =30001a(14) =177237a(15) =300001a(16) =312208a(17) =1762122a(18) =3000001a(19) =27515125a(20) =30000001a(21) =30122098a(22) =300000001a(23) =303758458a(24) =2673533185a(25) =2817818390a(26) =3000000001a(27) =3121001208a(28) =26928832879a(29) =28255878334