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%I #25 Jun 21 2015 14:05:39
%S 1,10,630,52650,165600,986310,9446031,9485190,10693000,1270004401,
%T 14214075921,140884670790,1809702709101,4614899724711,6766532724546,
%U 9802814901400,10210140486640,14287075542460,52657436563056,98855178542676
%N Triangular numbers whose reverse is a square (possibly with fewer digits).
%H Giovanni Resta, <a href="/A179889/b179889.txt">Table of n, a(n) for n = 1..36</a> (terms < 2*10^24)
%e 9446031 is triangular and 1306449 is a square.
%t trnos=Accumulate[Range[14070000]];
%t sqnoQ[n_]:=IntegerQ[Sqrt[FromDigits[Reverse[IntegerDigits[n]]]]]
%t Select[trnos,sqnoQ] (* _Harvey P. Dale_, Jan 31 2011 *)
%Y A variant of A066703. Cf. A069673, A181412, A066528.
%K base,nonn
%O 1,2
%A _Harvey P. Dale_, Jan 30 2011
%E More terms from _Harvey P. Dale_, Jan 31 2011