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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

Table of n, a(n) for n=1..28.

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

Cf. A000217, A000290.

Sequence in context: A265837 A264359 A110752 * A038780 A073984 A036907

Adjacent sequences:  A094970 A094971 A094972 * A094974 A094975 A094976

KEYWORD

nonn

AUTHOR

Rahman Md. Miaznur (m_rahmanjewel(AT)yahoo.com), Aug 26 2004

EXTENSIONS

Edited by Don Reble (djr(AT)nk.ca), Mar 17 2007

STATUS

approved

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Last modified December 5 09:15 EST 2016. Contains 278762 sequences.