OFFSET
1,2
LINKS
Valladolid problem set archive, Semi-triangular and also square
MATHEMATICA
Select[Union[Flatten[# Range[1, 15, 2]&/@Accumulate[Range[60000]]]], IntegerQ[Sqrt[#]]&] (* Harvey P. Dale, Nov 02 2011 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Rahman Md. Miaznur (m_rahmanjewel(AT)yahoo.com), Aug 26 2004
EXTENSIONS
Edited by Don Reble, Mar 17 2007
STATUS
approved