n times pi(n) is a palindrome, where pi(n) = PrimePi(n) = A000720(n).

Terms

a(0) =1a(1) =2a(2) =3a(3) =4a(4) =11a(5) =28a(6) =33a(7) =37a(8) =44a(9) =53a(10) =132a(11) =138a(12) =279a(13) =378a(14) =458a(15) =474a(16) =482a(17) =504a(18) =674a(19) =1628a(20) =1696a(21) =2002a(22) =2332a(23) =3117a(24) =4183a(25) =5518a(26) =6341a(27) =6623a(28) =7094a(29) =19261