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A032686 Numbers n such that n surrounded by digit '1' is a lucky number. 1

%I

%S 1,4,5,7,10,20,23,25,26,28,29,40,44,47,49,50,61,64,70,71,73,77,80,83,

%T 92,94,101,109,118,130,134,137,139,149,152,154,158,164,172,173,178,

%U 181,191,196,199,212,214,215,220,230,232,239,241,248,262,263

%N Numbers n such that n surrounded by digit '1' is a lucky number.

%Y Cf. A000959, A032682.

%K nonn,base

%O 1,2

%A _Patrick De Geest_, May 15 1998

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Last modified May 10 14:44 EDT 2021. Contains 343773 sequences. (Running on oeis4.)