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 A073789 Numbers in base -8. 11
 0, 1, 2, 3, 4, 5, 6, 7, 170, 171, 172, 173, 174, 175, 176, 177, 160, 161, 162, 163, 164, 165, 166, 167, 150, 151, 152, 153, 154, 155, 156, 157, 140, 141, 142, 143, 144, 145, 146, 147, 130, 131, 132, 133, 134, 135, 136, 137, 120, 121, 122, 123, 124, 125, 126 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 REFERENCES D. E. Knuth, The Art of Computer Programming. Addison-Wesley, Reading, MA, 1969, Vol. 2, p. 189. LINKS Reinhard Zumkeller, Table of n, a(n) for n = 0..10000 Prepared and presented by Matthew Szudzik of Wolfram Research, A Mathematica programming contest Eric Weisstein's World of Mathematics, Negabinary Wikipedia, Negative base MATHEMATICA ToNegaBases[i_Integer, b_Integer] := FromDigits[ Rest[ Reverse[ Mod[ NestWhileList[(#1 - Mod[ #1, b])/-b &, i, #1 != 0 &], b]]]]; Table[ ToNegaBases[n, 8], {n, 0, 60}] PROG (Haskell) a073789 0 = 0 a073789 n = a073789 n' * 10 + m where    (n', m) = if r < 0 then (q + 1, r + 8) else (q, r)              where (q, r) = quotRem n (negate 8) -- Reinhard Zumkeller, Jul 07 2012 (Python) def A073789(n):     s, q = '', n     while q >= 8 or q < 0:         q, r = divmod(q, -8)         if r < 0:             q += 1             r += 8         s += str(r)     return int(str(q)+s[::-1]) # Chai Wah Wu, Apr 09 2016 CROSSREFS Cf. A007094, A039724, A073785, A007608, A073786, A073787, A073788, A073790 & A039723. Sequence in context: A115916 A065667 A099146 * A004880 A065666 A240466 Adjacent sequences:  A073786 A073787 A073788 * A073790 A073791 A073792 KEYWORD base,easy,nonn AUTHOR Robert G. Wilson v, Aug 11 2002 STATUS approved

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Last modified April 14 22:47 EDT 2021. Contains 342971 sequences. (Running on oeis4.)