This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A114926 #6 Aug 08 2019 07:42:10
%S A114926 1,23,526,536,1802,4735,17191,38524,235652,36235483,1086331411,
%T A114926 5316125655,7202194357,49294058315,327040088933
%N A114926 Numbers n such that pi(n)=reversal(n)-n.
%C A114926 a(16) > 10^13. - _Giovanni Resta_, Aug 08 2019
%e A114926 36235483 is in the sequence because pi(36235483)=2217780= 38453263-36235483=reversal(36235483)-36235483.
%t A114926 Do[If[PrimePi[n]==FromDigits[Reverse[IntegerDigits[n]]] -n,Print[n]],{n,30000000}]
%Y A114926 Cf. A072393, A100415.
%K A114926 nonn,base,more
%O A114926 1,2
%A A114926 _Farideh Firoozbakht_, Feb 03 2006
%E A114926 a(11)-a(15) from _Giovanni Resta_, Aug 08 2019