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Search: id:A119992
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| A119992 |
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a(n) = n-th positive integer which is coprime to n!. |
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+0
3
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| 1, 3, 7, 11, 17, 19, 29, 31, 37, 41, 47, 53, 61, 67, 71, 73, 83, 89, 101, 103, 107, 109, 127, 131, 137, 139, 149, 151, 163, 167, 179, 181, 191, 193, 197, 199, 223, 227, 229, 233, 241, 251, 263, 269, 271, 277, 283, 293, 307, 311, 313, 317, 337, 347, 349, 353, 359
(list; graph; listen)
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OFFSET
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1,2
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EXAMPLE
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1,5,7,11,13,17,19,23,25,...is the sequence of positive integers which are coprime to 4! = 24. 11 is the 4th such integer, so a(4) = 11.
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MAPLE
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A119992 := proc(nmax) local a, n, i, j ; a := [] ; for n from 1 to nmax do j := 0 ; i := 1 ; while true do if gcd(i, n!) = 1 then j := j+1 ; if j = n then a := [op(a), i] ; break ; fi ; fi ; i := i+1 ; od ; od ; RETURN(a) ; end: an := A119992(100) : for i from 1 to nops(an) do printf("%d, ", an[i]) ; od ; - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Aug 06 2006
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CROSSREFS
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Sequence in context: A136059 A045419 A049098 this_sequence A023249 A090513 A081515
Adjacent sequences: A119989 A119990 A119991 this_sequence A119993 A119994 A119995
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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), Aug 03 2006
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EXTENSIONS
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More terms from R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Aug 06 2006
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