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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A110723 a(n) = A110722(n)/121. 5
0, 1, 4, 9, 16, 25, 36, 49, 64, 81, 910, 10201, 21312, 34243, 48994, 65565, 83956, 104167, 126198, 150049, 3640, 21312, 40804, 62116, 85248, 110200, 136972, 165564, 195976, 228208, 8190, 34243, 62116, 91809, 123322, 156655, 191808, 228781 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

G. C. Greubel, Table of n, a(n) for n = 0..1000

FORMULA

When n has one digit a(n)=n^2. When n has two digits a(n)= 910*x^2 + 8381*x*y + 910*y^2. (Here x,y are the digits of n.). - _Keith Schneider_, Jun 16 2007

EXAMPLE

a(13) = A110722(13)/121 = 4143403/121 = 34243.

MATHEMATICA

Table[FromDigits[Join[IntegerDigits[n], Reverse[IntegerDigits[n]]]]* FromDigits[Join[Reverse[IntegerDigits[n]], IntegerDigits[n]]]/121, {n, 0, 50}] (* G. C. Greubel, Sep 06 2017 *)

CROSSREFS

Cf. A110722.

Sequence in context: A077357 A294497 A080160 * A084617 A179126 A068879

Adjacent sequences:  A110720 A110721 A110722 * A110724 A110725 A110726

KEYWORD

base,easy,nonn

AUTHOR

Amarnath Murthy, Aug 09 2005

EXTENSIONS

Corrected and extended by James Greene (jmg482(AT)psu.edu), Apr 07 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
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified July 21 02:02 EDT 2019. Contains 325189 sequences. (Running on oeis4.)