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A067193
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Numbers n such that sigma(n)==4 (mod phi(n)).
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0
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24, 27, 44, 66, 75, 170, 944, 1200, 16064, 260864, 4189184
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| 3*10^9 < a(12) <= 17179541504. a(13) <= 274876596224. a(14) <= 1125899822956544. a(15) <= 4611686013058678784. [From Donovan Johnson (donovan.johnson(AT)yahoo.com), Dec 14 2009]
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CROSSREFS
| Sequence in context: A141632 A141634 A162465 * A095235 A164778 A030500
Adjacent sequences: A067190 A067191 A067192 * A067194 A067195 A067196
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KEYWORD
| nonn
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AUTHOR
| Benoit Cloitre (benoit7848c(AT)orange.fr), Feb 19 2002
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EXTENSIONS
| a(11) from Donovan Johnson (donovan.johnson(AT)yahoo.com), Dec 14 2009
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