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Search: id:A117533
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| 1, 3, 7, 13, 16, 23, 31, 41, 46, 57, 69, 83, 92, 107, 124, 137, 155, 175, 191, 213, 232, 255, 279, 305, 326, 353, 382, 407, 437, 469, 497, 531, 562, 597, 633, 671, 704, 743, 784, 821, 863, 907, 947, 993, 1036, 1083, 1131, 1181, 1226, 1277, 1330, 1379, 1433
(list; graph; listen)
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OFFSET
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1,2
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COMMENT
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a(n) is coprime to n.
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MAPLE
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A117532 := proc(nmax) local a, n, nxt, asu ; a := [1] ; asu := 1 ; while nops(a) < nmax do n := nops(a)+1 ; nxt := 1 ; while nxt in a or gcd(n, asu+nxt) <> 1 do nxt := nxt+1 ; od ; a := [op(a), nxt] ; asu := asu+nxt ; od ; a ; end: A117533 := proc(a117532, n) local i ; add(op(i, a117532), i=1..n) ; end: a117532 := A117532(80) : seq( A117533(a117532, n), n=1..nops(a117532)) ; - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), May 10 2007
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CROSSREFS
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Cf. A117532, A117534.
Sequence in context: A080565 A002254 A060657 this_sequence A065057 A100807 A040999
Adjacent sequences: A117530 A117531 A117532 this_sequence A117534 A117535 A117536
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KEYWORD
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nonn
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AUTHOR
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Leroy Quet (qq-quet(AT)mindspring.com), Mar 26 2006
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EXTENSIONS
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More terms from R. J. Mathar (mathar(AT)strw.leidenuniv.nl), May 10 2007
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