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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A045609 Numbers n such that n | 10^n + 9^n. 0
1, 19, 361, 6859, 80161, 130321, 142253, 231059, 1523059, 1555207, 2476099, 2702807, 4390121, 28938121, 29548933, 47045881, 51353333, 83412299, 188190383, 338199259, 549824299, 561429727, 600165407, 893871739, 974837921 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..25.

MATHEMATICA

Select[ Range[ 10^9 ], Mod[ PowerMod[ 10, #, # ] + PowerMod[ 9, #, # ], # ] == 0 & ]

CROSSREFS

Sequence in context: A208042 A208031 A171293 * A128360 A001029 A057685

Adjacent sequences:  A045606 A045607 A045608 * A045610 A045611 A045612

KEYWORD

nonn

AUTHOR

David W. Wilson

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.

License Agreements, Terms of Use, Privacy Policy. .

Last modified March 21 07:23 EDT 2019. Contains 321367 sequences. (Running on oeis4.)