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

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A117246 Left truncatable squares, ending in 5. 0

%I

%S 225,625,1225,2025,3025,4225,5625,7225,9025,15625,27225,30625,34225,

%T 42025,50625,60025,70225,75625,81225,93025,105625,275625,330625,

%U 600625,893025,950625,970225,1050625,2030625,3330625,4950625,40005625

%N Left truncatable squares, ending in 5.

%C There are no other terms with less than 30 digits. Probably this is the full list. - _Giovanni Resta_, Apr 27 2006

%D D. V. Ramana Rao, "Square Cuts" in '2001', pp. 96, October 1988, Times of India, Mumbai.

%e 275625 is in the sequence because repeatedly deleting the first digit leaves a succession of squares: 275625=525^2; 75625=275^2; 5625=75^2; 625=25^2; 25=5^2.

%K nonn,base

%O 1,1

%A _Lekraj Beedassy_, Apr 23 2006

%E More terms from _Giovanni Resta_, Apr 27 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.

Last modified September 23 02:41 EDT 2021. Contains 347609 sequences. (Running on oeis4.)