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

 

Logo

Annual appeal: Please make a donation to keep the OEIS running! Over 6000 articles have referenced us, often saying "we discovered this result with the help of the OEIS".
Other ways to donate

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A071177 Square-root of concatenation n'k, where k is minimal with n'k square (decimal notation). 1
4, 5, 6, 7, 23, 8, 27, 9, 31, 10, 34, 11, 37, 12, 39, 13, 42, 43, 14, 45, 46, 15, 152, 156, 16, 162, 165, 17, 54, 55, 56, 18, 58, 59, 188, 19, 61, 62, 63, 20, 203, 65, 66, 21, 213, 68, 69, 22, 222, 71, 72, 23, 73, 74, 235, 75, 24, 242 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

a(n) = A000196(n'A071176(n))

LINKS

Table of n, a(n) for n=1..58.

EXAMPLE

a(5) = 23 as 23^2 = 529 = 5'29 and 5'i is nonsquare for i<29, A071176(5)=29.

CROSSREFS

Sequence in context: A161627 A030667 A030677 * A010754 A187807 A051036

Adjacent sequences:  A071174 A071175 A071176 * A071178 A071179 A071180

KEYWORD

nonn,base

AUTHOR

Reinhard Zumkeller, May 15 2002

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 December 11 19:09 EST 2017. Contains 295919 sequences.