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A076701
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Values of n not reached in the Hofstadter sequence (A005185).
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3
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7, 13, 15, 18, 27, 29, 34, 36, 49, 51, 59, 67, 70, 74, 81, 89, 95, 97, 98, 99, 102, 103, 117, 126, 127, 131, 134, 141, 142, 145, 150, 158, 163, 166, 181, 183, 189, 191, 195, 197, 198, 199, 205, 207, 209, 213, 224, 225, 232, 247, 259, 265, 267, 270, 274, 281
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OFFSET
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1,1
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COMMENTS
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For any n, there is no solution to a(n) = A005185(x). Does lim_{n -> infinity} a(n)/n exist?
Plotting a(n)/n for the first 6 billion terms, it appears to be converging to ~7.39. - Benjamin Chaffin, Sep 17 2019
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LINKS
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MATHEMATICA
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a[1] = a[2] = 1; a[n_] := a[n] = a[n - a[n - 1]] + a[n - a[n - 2]]; t = Table[a[n], {n, 1000}]; Take[ Complement[ Range@ 502, Union@ t], 56]
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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