A110723 a(n) = A110722(n)/121.

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

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 * A376215 A084617 A179126

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