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A094973 Square numbers which equal a triangular number times an odd number between 1 and 15. 0
1, 9, 36, 196, 225, 324, 900, 1225, 4225, 11025, 41616, 53361, 88209, 108900, 176400, 324900, 374544, 1413721, 8643600, 12723489, 43956900, 48024900, 52490025, 158407396, 432224100, 468506025, 846984609, 1631432881 (list; graph; refs; listen; history; text; internal format)
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
Sequence in context: A264359 A280353 A110752 * A038780 A073984 A036907
KEYWORD
nonn
AUTHOR
Rahman Md. Miaznur (m_rahmanjewel(AT)yahoo.com), Aug 26 2004
EXTENSIONS
Edited by Don Reble, Mar 17 2007
STATUS
approved

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Last modified March 19 01:57 EDT 2024. Contains 370952 sequences. (Running on oeis4.)