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 A077376 #12 Sep 19 2024 21:59:26
%S A077376 122,123,127,129,130,131,133,134,137,138,139,151,154,155,157,158,159,
%T A077376 161,163,165,166,167,170,173,174,177,178,179,221,222,223,226,227,229,
%U A077376 230,231,233,235,237,238,239,251,253,254,255,257,258,259,262,263,265,266
%N A077376 Squarefree numbers whose internal digits form a squarefree number.
%C A077376 Here 1 is treated as not squarefree. - _Harvey P. Dale_, Jul 22 2012
%t A077376 sf2Q[n_]:=Module[{c=FromDigits[Most[Rest[IntegerDigits[n]]]]},c!=1&&SquareFreeQ[ n]&&SquareFreeQ[c]]; Select[Range[100,300],sf2Q] (* _Harvey P. Dale_, Jul 22 2012 *)
%Y A077376 Cf. A077377, A077378, A077379, A077380.
%K A077376 base,easy,nonn
%O A077376 1,1
%A A077376 _Amarnath Murthy_, Nov 06 2002
%E A077376 More terms from _Harvey P. Dale_, Jul 22 2012
%E A077376 Offset changed by _Andrew Howroyd_, Sep 19 2024