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 A086999 Periodic part of decimal expansion of 1/p for those primes having a periodic part of even length. 3
 142857, 90, 769230, 5882352941176470, 526315789473684210, 4347826086956521739130, 3448275862068965517241379310, 2127659574468085106382978723404255319148936170 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS A087001(n)=floor(a(n)/10^A087000(n)), A087002(n)=a(n) mod 10^A087000(n); A087001(n) + A087002(n) = 10^A087000(n) - 1; a(n) = A087001(n)*10^A087000(n) + A087002(n). REFERENCES H. Rademacher and O. Toeplitz, Von Zahlen und Figuren (Springer 1930, reprinted 1968), ch. 19, Die periodischen Dezimalbrueche. LINKS Eric Weisstein's World of Mathematics, Decimal Expansion Eric Weisstein's World of Mathematics, Repeating Decimal Eric Weisstein's World of Mathematics, Midy's Theorem EXAMPLE p=73: a(11)=A060283(21)=13698630 -> [1369][8630] -> A087001(11)=1369, A087002(11)=8630, A087001(11)+A087002(11)=1369+8630=9999. CROSSREFS a(n)=A060283(A049084(A0A028416(n))), A002283. Sequence in context: A204287 A256630 A263037 * A175694 A023089 A166320 Adjacent sequences:  A086996 A086997 A086998 * A087000 A087001 A087002 KEYWORD nonn,base AUTHOR Reinhard Zumkeller, Jul 29 2003 STATUS approved

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Last modified June 7 05:20 EDT 2020. Contains 334837 sequences. (Running on oeis4.)