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A283889
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Relative of Hofstadter Q-sequence: a(n) = max(0, n+10000) for n <= 0; a(n) = a(n-a(n-1)) + a(n-a(n-2)) + a(n-a(n-3)) + a(n-a(n-4)) for n > 0.
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4
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10, 10001, 10002, 10003, 10004, 14, 10005, 10006, 10007, 10008, 18, 10009, 10010, 10011, 10012, 22, 10013, 10014, 10015, 10016, 26, 10017, 10018, 10019, 10020, 30, 10021, 10022, 10023, 10024, 34, 10025, 10026, 10027, 37, 10029, 10029, 39
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OFFSET
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1,1
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COMMENTS
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Sequences like this are more naturally considered with the first nonzero term in position 1. But this sequence would then match A000027 for its first 10000 terms.
This sequence has some stretches where it is quasilinear, but it appears to be ultimately chaotic.
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STATUS
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approved
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