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Search: id:A003157
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| A003157 |
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A self-generating sequence.
(Formerly M2713)
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+0
7
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| 3, 8, 11, 14, 19, 24, 29, 32, 35, 40, 43, 46, 51, 54, 57, 62, 67, 72, 75, 78, 83, 88, 93, 96, 99, 104, 109, 114, 117, 120, 125, 128, 131, 136, 139, 142, 147, 152, 157, 160
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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Indices of c in the sequence closed under a -> abc, b -> a, c -> a, starting with a(1) = a; see A092606 where a = 0, b = 2, c = 1 . - DELEHAM Philippe (kolotoko(AT)wanadoo.fr), Apr 12 2004
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REFERENCES
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N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
L. Carlitz, R. Scoville and V. E. Hoggatt, Jr., Representations for a special sequence, Fib. Quart., 10 (1972), 499-518, 550.
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FORMULA
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Numbers n such that A003159(n) is even. a(n) = A003158(n) + 1 = A036554(n) + n. - DELEHAM Philippe (kolotoko(AT)wanadoo.fr), Feb 22 2004
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CROSSREFS
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Sequence in context: A108752 A020680 A051245 this_sequence A081858 A145837 A111132
Adjacent sequences: A003154 A003155 A003156 this_sequence A003158 A003159 A003160
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KEYWORD
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nonn
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com).
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