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A121215
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a(1)=1. a(n) = n-th integer from among those positive integers which do not occur earlier in the sequence and which are not coprime to n.
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0
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1, 4, 9, 10, 30, 14, 56, 22, 33, 24, 143, 27, 182, 35, 48, 44, 289, 40, 361, 50, 70, 62, 529, 57, 155, 72, 105, 76, 841, 64, 1023, 96, 114, 94, 140, 84, 1369, 110, 132, 100, 1681, 90, 1849, 124, 144, 136, 2256, 112, 406, 128, 180, 154, 2809, 126, 270, 158, 204, 176
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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EXAMPLE
| 2,3,6,8,12,14,15,16,...is the sequence of positive integers which do not occur among the first 5 terms of the sequence and which are not coprime to 6. 14 is the 6th of these integers, so a(6) = 14.
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CROSSREFS
| Cf. A105054.
Sequence in context: A129830 A113434 A141395 * A178224 A102985 A112401
Adjacent sequences: A121212 A121213 A121214 * A121216 A121217 A121218
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KEYWORD
| nonn
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AUTHOR
| Leroy Quet Aug 20 2006
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EXTENSIONS
| Extended by Ray Chandler (rayjchandler(AT)sbcglobal.net), Aug 22 2006
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