login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A087392 a(1) = 1, a(n) = smallest multiple of n beginning with the digit reversal of a(n-1). 0

%I

%S 1,10,12,212,2120,2124,42126,621240,421263,3621240,4212637,73621248,

%T 842126376,67362124802,2084212637610,16736212480208,802084212637617,

%U 7167362124802086,680208421263761709,9071673621248020860

%N a(1) = 1, a(n) = smallest multiple of n beginning with the digit reversal of a(n-1).

%F a(n) = n*ceiling((1/n)*reverse(a(n-1))*10^f(n)) where f(n) starts out practically always 1 or 2 and reaches higher values extremely slowly. - _Sam Alexander_, Nov 15 2003

%e a(6) = 2124; a(7) = 42126, which begins with the digit reversal of 2124.

%K base,nonn

%O 1,2

%A _Amarnath Murthy_, Sep 09 2003

%E More terms from _Sam Alexander_, Nov 15 2003

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified February 4 04:43 EST 2023. Contains 360046 sequences. (Running on oeis4.)