The OEIS mourns the passing of Jim Simons and is grateful to the Simons Foundation for its support of research in many branches of science, including the OEIS.
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!)
A249970 Numbers whose squares remain squares when prepended with 4 and appended with 25 in base 10. 5

%I #13 Nov 23 2014 03:07:51

%S 1390,3055334,28638619086007684802380,296356838660564717696928980,

%T 296450546123962656267474730

%N Numbers whose squares remain squares when prepended with 4 and appended with 25 in base 10.

%C a(6) >= 10^50. - _Hiroaki Yamanouchi_, Nov 22 2014

%e 1390^2 = 1932100, 4193210025 = 64755^2.

%Y Cf. A249968, A249969, A249971.

%K nonn,base,more

%O 1,1

%A _Chai Wah Wu_, Nov 18 2014

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 June 15 00:47 EDT 2024. Contains 373402 sequences. (Running on oeis4.)