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 A065924 Numbers n such that 1/n starts with n, after excluding leading zeros. 1
 1, 3, 10, 100, 316, 1000, 3162, 10000, 100000, 1000000, 10000000, 100000000, 316227766, 1000000000, 3162277660, 10000000000, 100000000000, 1000000000000, 3162277660168, 10000000000000, 100000000000000 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS All the terms are either 10^k or 10^k*sqrt(10) rounded down. LINKS EXAMPLE 316 is present because 1/316 = 0.00316.. MAPLE with(numtheory); P:=proc(i) local a, b, c, n; for n from 1 to i do   a:=1/n; b:=n; c:=0; while a<1 do a:=10*a; od;   while b>0 do c:=c+1; b:=trunc(b/10); od;   a:=trunc(10^(c-1)*a); if n=a then print(n); fi; od; end: P(100000000000); # Paolo P. Lava, Dec 16 2011 CROSSREFS Sequence in context: A216450 A181079 A240512 * A013233 A013226 A013231 Adjacent sequences:  A065921 A065922 A065923 * A065925 A065926 A065927 KEYWORD base,nonn AUTHOR Jonathan Ayres (jonathan.ayres(AT)btinternet.com), Nov 28 2001 STATUS approved

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Last modified August 12 21:10 EDT 2020. Contains 336440 sequences. (Running on oeis4.)