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

 

Logo

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 59th year, we have over 358,000 sequences, and we’ve crossed 10,300 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A164774 Numbers n with property that average digit of n^2 is s=5. 5
8, 113, 122, 157, 158, 166, 176, 184, 193, 194, 212, 221, 238, 256, 257, 266, 274, 275, 283, 284, 292, 311, 3283, 3314, 3386, 3391, 3413, 3458, 3463, 3517, 3544, 3562, 3593, 3674, 3683, 3697, 3724, 3733, 3737, 3764, 3814, 3827, 3836, 3859, 3863, 3872, 3917 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..47.

EXAMPLE

8^2=64 and (6+4)/2=5

113^2=12769 and (1+2+7+6+9)/5=5.

PROG

(PARI) dsum(n)={my(s=0); while(n>9, s+=n%10; n\=10); s+n}; for(n=1, 1e6, if(dsum(n^2)/#Str(n^2)==5, print1(n", ")))

CROSSREFS

A164770 (s=2), A164771 (s=1), A164772 (s=8), A164773 (s=7).

Sequence in context: A010041 A099703 A296467 * A259590 A155460 A064090

Adjacent sequences: A164771 A164772 A164773 * A164775 A164776 A164777

KEYWORD

nonn,base,easy

AUTHOR

Zak Seidov, Aug 26 2009

EXTENSIONS

Program by Charles R Greathouse IV, Nov 01 2009

STATUS

approved

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 December 5 02:30 EST 2022. Contains 358572 sequences. (Running on oeis4.)