A127723 Floor of square root of sum of squares of the first n consecutive even numbers.

2, 4, 7, 10, 14, 19, 23, 28, 33, 39, 44, 50, 57, 63, 70, 77, 84, 91, 99, 107, 115, 123, 131, 140, 148, 157, 166, 175, 184, 194, 204, 213, 223, 233, 244, 254, 265, 275, 286, 297, 308, 319, 331, 342, 354, 366, 377, 389, 402, 414, 426, 439, 451, 464, 477, 490, 503

Offset: 1

Author

Artur Jasinski, Jan 25 2007

Keywords

• nonn

Crossrefs

Cf. A127719, A127720, A127721, A127722.

Programs

Mathematica

a = {}; k = 0; Do[k = k + x^2; AppendTo[a, Floor[Sqrt[k]]], {x, 2, 150, 2}]; a
Floor[Sqrt[#]]&/@Accumulate[Range[2,120,2]^2] (* Harvey P. Dale, Nov 04 2012 *)

Extensions

Definition clarified by Harvey P. Dale, Nov 04 2012