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A066791
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Eulerphi(n^2+n+1).
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1
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2, 6, 12, 12, 30, 42, 36, 72, 72, 72, 108, 156, 120, 210, 240, 144, 306, 294, 252, 420, 462, 312, 468, 600, 360, 648, 756, 540, 792, 756, 660, 900, 1122, 792, 1152, 1260, 792, 1482, 1332, 1092, 1722, 1656, 1260, 1692, 1944, 1224, 2160, 2160, 1512, 2550
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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LINKS
| Harry J. Smith, Table of n, a(n) for n=1,...,1000
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PROG
| (PARI) { for (n=1, 1000, write("b066791.txt", n, " ", eulerphi(n^2 + n + 1)) ) } [From Harry J. Smith (hjsmithh(AT)sbcglobal.net), Mar 27 2010]
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CROSSREFS
| Sequence in context: A092427 A058198 A096075 * A062723 A152667 A145892
Adjacent sequences: A066788 A066789 A066790 * A066792 A066793 A066794
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KEYWORD
| nonn
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AUTHOR
| Benoit Cloitre (benoit7848c(AT)orange.fr), Jan 18 2002
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