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Search: id:A075317
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| A075317 |
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Pair the odd numbers such that the k-th pair is (r, r+2k) where r is the smallest odd number not included earlier: (1,3),(5,9),(7,13),(11,19),(15,25),(17,29),(21,35),(23,39),(27,45),... This is the sequence of the first member of pairs. |
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4
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| 1, 5, 7, 11, 15, 17, 21, 23, 27, 31, 33, 37, 41, 43, 47, 49, 53, 57, 59, 63, 65, 69, 73, 75, 79, 83, 85, 89, 91, 95, 99, 101, 105, 109, 111, 115, 117, 121, 125, 127, 131, 133, 137, 141, 143, 147, 151, 153, 157, 159, 163, 167, 169, 173, 175, 179, 183, 185, 189, 193
(list; graph; listen)
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OFFSET
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1,2
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MAPLE
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A075317 := proc(nmax) local r, k, a, pairs ; a := [1] ; pairs := [1, 3] ; k := 2 ; r := 5 ; while nops(a) < nmax do while r in pairs do r := r+2 ; od ; a := [op(a), r] ; if r+2*k in pairs then printf("inconsistency", k) ; fi ; pairs := [op(pairs), r, r+2*k] ; k := k+1 ; od ; RETURN(a) ; end: a := A075317(200) ; for n from 1 to nops(a) do printf("%d, ", op(n, a)) ; od ; - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Nov 12 2006
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CROSSREFS
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Cf. A075318, A075319, A075320.
Sequence in context: A098243 A037141 A029624 this_sequence A134643 A039001 A023741
Adjacent sequences: A075314 A075315 A075316 this_sequence A075318 A075319 A075320
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KEYWORD
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nonn
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AUTHOR
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Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Sep 14 2002
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EXTENSIONS
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More terms from R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Nov 12 2006
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