login
This site is supported by donations to The OEIS Foundation.
Logo

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A074380 Sarrus numbers n (A001567) which satisfy mu(n) = -1 and which are not Super-Poulet numbers (A050217). 1
561, 645, 1105, 1729, 1905, 2465, 2821, 4371, 6601, 8481, 8911, 10585, 12801, 13741, 13981, 15841, 16705, 25761, 29341, 30121, 30889, 33153, 34945, 41665, 46657, 52633, 57421, 68101, 74665, 83665, 87249, 88561, 91001, 93961, 113201 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

COMMENTS

Some of these are Carmichael numbers, A002997: 561, 1105, 1729, ....

LINKS

Charles R Greathouse IV, Table of n, a(n) for n = 1..10000

MATHEMATICA

Select[ Range[115000], !PrimeQ[ # ] && OddQ[ # ] && PowerMod[2, # - 1, # ] == 1 && Union[ PowerMod[2, Drop[Divisors[ # ], 1], # ]] != {2} && MoebiusMu[ # ] != 1 &]

CROSSREFS

Cf. A001567, A050217, A002997.

Sequence in context: A184047 A192297 A080747 * A085999 A137198 A194231

Adjacent sequences:  A074377 A074378 A074379 * A074381 A074382 A074383

KEYWORD

nonn

AUTHOR

Jani Melik (jani_melik(AT)hotmail.com), Sep 24 2002

EXTENSIONS

Edited and extended by Robert G. Wilson v (rgwv(AT)rgwv.com), Oct 03 2002

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Puzzles | Hot | Classics
Recent Additions | More pages | Superseeker | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement .

Last modified February 15 14:20 EST 2012. Contains 205811 sequences.