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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A089766 Smallest prime obtained as k*n! concatenated with a 1 for some k. 0
11, 11, 41, 61, 241, 1201, 14401, 100801, 5241601, 10886401, 72576001, 2395008001, 14370048001, 124540416001, 9589612032001, 143844180480001, 2719962685440001, 53353114214400001, 832308581744640001 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Table of n, a(n) for n=0..18.

EXAMPLE

a(7) = 100801 is a prime obtained as 2*7! = 2*5040 = 10080 followed by a 1.

MAPLE

for n from 0 to 20 do for k from 1 do m:=10*k*n!+1 : if isprime(m) then printf("%d, ", m): break fi od od: # C. Ronaldo

CROSSREFS

Sequence in context: A070849 A124297 A172507 * A077699 A266705 A228768

Adjacent sequences:  A089763 A089764 A089765 * A089767 A089768 A089769

KEYWORD

base,nonn

AUTHOR

Amarnath Murthy, Nov 23 2003

EXTENSIONS

More terms from C. Ronaldo (aga_new_ac(AT)hotmail.com), Dec 26 2004

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 October 19 11:09 EDT 2019. Contains 328216 sequences. (Running on oeis4.)