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A080460
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a(1)=2; for n>1, a(n)=a(n-1) if n is already in the sequence, a(n)=a(n-1)+4 otherwise.
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0
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2, 2, 6, 10, 14, 14, 18, 22, 26, 26, 30, 34, 38, 38, 42, 46, 50, 50, 54, 58, 62, 62, 66, 70, 74, 74, 78, 82, 86, 86, 90, 94, 98, 98, 102, 106, 110, 110, 114, 118, 122, 122, 126, 130, 134, 134, 138, 142, 146, 146, 150, 154, 158, 158, 162, 166, 170, 170
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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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) = 2+4*(n-2-floor((n-2)/4)).
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CROSSREFS
| Cf. A080455-A080458, A080036, A080037.
Sequence in context: A077063 A081728 A197218 * A077017 A181551 A127404
Adjacent sequences: A080457 A080458 A080459 * A080461 A080462 A080463
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KEYWORD
| nonn
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com) and Benoit Cloitre, Mar 22 2003
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