Positive integers k such that k-th triangular number is palindromic.

Terms

a(0) =1a(1) =2a(2) =3a(3) =10a(4) =11a(5) =18a(6) =34a(7) =36a(8) =77a(9) =109a(10) =132a(11) =173a(12) =363a(13) =1111a(14) =1287a(15) =1593a(16) =1833a(17) =2662a(18) =3185a(19) =3369a(20) =3548a(21) =8382a(22) =11088a(23) =18906a(24) =50281a(25) =57166a(26) =102849a(27) =111111a(28) =167053a(29) =179158