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A007893
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A Kutz sequence.
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1
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1, 4, 9, 16, 1, 4, 9, 16, 25, 4, 9, 16, 25, 36, 9, 16, 25, 36, 49, 16, 25, 36, 49, 64, 25, 36, 49, 64, 81, 36, 49, 64, 81, 100, 49, 64, 81, 100, 121, 64, 81, 100, 121, 144, 81, 100, 121, 144, 169, 100, 121, 144, 169, 196, 121, 144, 169, 196, 225, 144, 169, 196
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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REFERENCES
| R. E. Kutz, Two unusual sequences, Two-Year College Mathematics Journal, 12 (1981), 316-319.
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LINKS
| Vincenzo Librandi, Table of n, a(n) for n = 1..10000
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FORMULA
| The pattern is obvious!
a(n) = (n-4*floor(n/5))^2. - Michael Somos
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MATHEMATICA
| Table[(n - 4*Floor[n/5])^2, {n, 60}] (* Arkadiusz Wesolowski, Sep 29 2011 *)
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PROG
| (MAGMA) [(n-4*Floor(n/5))^2: n in [1..60]]; // Vincenzo Librandi, Sep 30 2011
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CROSSREFS
| Sequence in context: A070447 A106548 A106546 * A070446 A070445 A070444
Adjacent sequences: A007890 A007891 A007892 * A007894 A007895 A007896
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KEYWORD
| nonn,easy
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
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