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 A081433 #12 Jan 30 2023 08:28:57 %S A081433 0,1,2,3,4,5,6,7,8,9,15,33,51,66,99,165,313,516,535,561,585,615,626, %T A081433 717,759,858,929,957,1241,1421,2112,2482,2552,2842,3579,4224,5485, %U A081433 5845,6336,7447,8448,9009,9753,11051,12631,13621,15011,15351,15375 %N A081433 Numbers n such that RevBinary(RevDecimal(n))=RevDecimal(RevBinary(n)), where RevDecimal(n) is the decimal reversal of n (A004086) and RevBinary(n) is the binary reversal of n (A030101). %C A081433 A030101(A004086(a(n)))=A004086(A030101(a(n))), A081431(a(n))=A081432(a(n)). %o A081433 (Python) %o A081433 def ok(n): return int(bin(int(str(n)[::-1]))[:1:-1], 2) == int(str(int(bin(n)[:1:-1], 2))[::-1]) %o A081433 print([k for k in range(2**14) if ok(k)]) # _Michael S. Branicky_, Jan 30 2023 %Y A081433 Cf. A081432, A081434, A007088. %K A081433 nonn,base %O A081433 1,3 %A A081433 _Reinhard Zumkeller_, Mar 20 2003