This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A294576 Odd numbers n such that 2 * A243823(n) > n. 2
 945, 1155, 1365, 1575, 1785, 1995, 2145, 2205, 2415, 2625, 2805, 2835, 3003, 3045, 3135, 3255, 3315, 3465, 3675, 3705, 3795, 3885, 4095, 4125, 4305, 4455, 4485, 4515, 4725, 4785, 4845, 4935, 5115, 5145, 5355, 5445, 5565, 5655, 5775, 5865, 5985 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Odd terms in A294575. 2^k - 1 is in the sequence for k = 12, 20, 24, 28, 30, 36, 40, 48, ... LINKS Michael De Vlieger, Table of n, a(n) for n = 1..10000 MATHEMATICA Select[Range[1, 6000, 2], Function[n, 2 (n - (Count[Range@ n, _?(PowerMod[n, Floor@ Log2@ n, #] == 0 &)] + EulerPhi[n] - 1)) > n]] CROSSREFS Cf. A243823, A272619, A294575. Sequence in context: A133814 A104438 A125013 * A252192 A252185 A005231 Adjacent sequences:  A294573 A294574 A294575 * A294577 A294578 A294579 KEYWORD nonn AUTHOR Michael De Vlieger, Nov 17 2017 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified August 18 22:29 EDT 2019. Contains 326109 sequences. (Running on oeis4.)