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A080199
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a(1)=1; for n>1, a(n)=a(n-1) - 3 if n is already in the sequence, a(n)=a(n-1) + 6 otherwise.
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0
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1, 7, 13, 19, 25, 31, 28, 34, 40, 46, 52, 58, 55, 61, 67, 73, 79, 85, 82, 88, 94, 100, 106, 112, 109, 115, 121, 118, 124, 130, 127, 133, 139, 136, 142, 148, 154, 160, 166, 163, 169, 175, 181, 187, 193, 190, 196, 202, 208, 214, 220, 217, 223, 229
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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LINKS
| B. Cloitre, N. J. A. Sloane and M. J. Vandermast, Numerical analogues of Aronson's sequence, J. Integer Seqs., Vol. 6 (2003), #03.2.2.
B. Cloitre, N. J. A. Sloane and M. J. Vandermast, Numerical analogues of Aronson's sequence (math.NT/0305308)
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FORMULA
| a(n) = 3*n*(1 + 1/log_3(n)) + o(n).
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CROSSREFS
| Cf. A080455-A080458, A080036, A080037.
Sequence in context: A035497 A059335 A070419 * A016921 A184521 A123843
Adjacent sequences: A080196 A080197 A080198 * A080200 A080201 A080202
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KEYWORD
| nonn
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com), Mar 20 2003
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