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Floor of square root of sum of squares of the first n consecutive even numbers.
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%I #6 Nov 04 2012 11:13:26

%S 2,4,7,10,14,19,23,28,33,39,44,50,57,63,70,77,84,91,99,107,115,123,

%T 131,140,148,157,166,175,184,194,204,213,223,233,244,254,265,275,286,

%U 297,308,319,331,342,354,366,377,389,402,414,426,439,451,464,477,490,503

%N Floor of square root of sum of squares of the first n consecutive even numbers.

%t a = {}; k = 0; Do[k = k + x^2; AppendTo[a, Floor[Sqrt[k]]], {x, 2, 150, 2}]; a

%t Floor[Sqrt[#]]&/@Accumulate[Range[2,120,2]^2] (* _Harvey P. Dale_, Nov 04 2012 *)

%Y Cf. A127719, A127720, A127721, A127722.

%K nonn

%O 1,1

%A _Artur Jasinski_, Jan 25 2007

%E Definition clarified by _Harvey P. Dale_, Nov 04 2012