login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A115549 Numbers n such that the concatenation of n with 8*n gives a square. 0
3, 12, 28, 63, 112, 278, 1112, 2778, 11112, 27778, 111112, 277778, 1111112, 2777778, 4938272, 7716050, 11111112, 12802888, 13151250, 13504288, 13862002, 14224392, 14591458, 14963200, 15339618, 15720712, 16106482, 16496928 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..28.

EXAMPLE

3_24 = 18^2.

CROSSREFS

Cf. A102567, A106497, A115527 - A115556.

Sequence in context: A066643 A140065 A294418 * A005995 A034503 A026557

Adjacent sequences:  A115546 A115547 A115548 * A115550 A115551 A115552

KEYWORD

nonn,base

AUTHOR

Giovanni Resta, Jan 25 2006

STATUS

approved

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

License Agreements, Terms of Use, Privacy Policy .

Last modified February 17 14:12 EST 2018. Contains 299296 sequences. (Running on oeis4.)