The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.



(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A115689 Powerful(1) numbers (A001694) whose digit reversal is a square. 2


%S 1,4,9,100,121,144,169,400,441,484,675,676,900,961,1000,1089,1800,

%T 4000,9000,9801,10000,10201,10404,10609,12100,12321,12544,12769,14400,

%U 14641,14884,16900,18000,18252,40000,40401,40804,44100,44521,44944

%N Powerful(1) numbers (A001694) whose digit reversal is a square.

%H <a href="/index/Pow#powerful">Index entries for sequences related to powerful numbers</a>

%e 18252=2^2*3^3*13^2 is powerful and 25281=159^2.

%Y Cf. A001694, A115690.

%K nonn,base

%O 1,2

%A _Giovanni Resta_, Jan 31 2006

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 February 27 07:07 EST 2020. Contains 332300 sequences. (Running on oeis4.)