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A073786 Numbers in base -5. 11
0, 1, 2, 3, 4, 140, 141, 142, 143, 144, 130, 131, 132, 133, 134, 120, 121, 122, 123, 124, 110, 111, 112, 113, 114, 100, 101, 102, 103, 104, 240, 241, 242, 243, 244, 230, 231, 232, 233, 234, 220, 221, 222, 223, 224, 210, 211, 212, 213, 214, 200, 201, 202, 203 (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
Eric Weisstein's World of Mathematics, Negabinary
Prepared and presented by Matthew Szudzik of Wolfram Research, A Mathematica programming contest
MATHEMATICA
ToNegaBases[i_Integer, b_Integer] := FromDigits[ Rest[ Reverse[ Mod[ NestWhileList[(#1 - Mod[ #1, b])/-b &, i, #1 != 0 &], b]]]]; Table[ ToNegaBases[n, 5], {n, 0, 55}]
PROG
(Python)
def A073786(n):
s, q = '', n
while q >= 5 or q < 0:
q, r = divmod(q, -5)
if r < 0:
q += 1
r += 5
s += str(r)
return int(str(q)+s[::-1]) # Chai Wah Wu, Apr 09 2016
CROSSREFS
Sequence in context: A001095 A004866 A062930 * A127280 A229622 A244552
KEYWORD
base,easy,nonn
AUTHOR
Robert G. Wilson v, Aug 11 2002
STATUS
approved

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Last modified March 19 03:33 EDT 2024. Contains 370952 sequences. (Running on oeis4.)