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1, 2, 2, 3, 2, 2, 3, 2, 2, 4, 2, 2, 2, 3, 2, 2, 3, 2, 2, 4, 2, 2, 2, 3, 2, 2, 3, 2, 2, 5, 2, 2, 2, 2, 3, 2, 2, 3, 2, 2, 3, 2, 2, 4, 2, 2, 2, 3, 2, 2, 3, 2, 2, 4, 2, 2, 2, 3, 2, 2, 3, 2, 2, 5, 2, 2, 2, 2, 3, 2, 2, 3, 2, 2, 3, 2, 2, 4, 2, 2, 2, 3, 2, 2, 3, 2, 2, 4, 2, 2, 2, 3, 2, 2, 3, 2, 2, 6, 2, 2, 2, 2, 2, 3, 2
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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COMMENTS
| Records form A087161: a(A087161(n))=n and satisfy recurrence: A087161(n+3) = 5*A087161(n+2) - 6*A087161(n+1) + 2*A087161(n).
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EXAMPLE
| Initialize all terms to 2. Set a(1)=1, go one term forward,
set a(2)=a(1)+1=2, go 2 terms forward,
set a(4)=a(2)+1=3, go 3 terms forward,
set a(7)=a(3)+1=3, go 3 terms forward,
set a(10)=a(4)+1=4, go 4 terms forward,
set a(14)=a(5)+1=3, etc.
The indices 1,2,4,7,10,14,... form A087160.
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CROSSREFS
| Cf. A087160, A087161.
Sequence in context: A003589 A082204 A152727 * A062502 A141242 A130451
Adjacent sequences: A087156 A087157 A087158 * A087160 A087161 A087162
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KEYWORD
| nonn
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AUTHOR
| Paul D. Hanna (pauldhanna(AT)juno.com), Aug 22 2003
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