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A067124
Floor [sqrt{concatenation of first n squares}].
1
1, 3, 12, 122, 1221, 12213, 122132, 1221321, 12213211, 386215660, 12213211555, 386215660604, 12213211555380, 386215660604902, 12213211555380554, 386215660604902322, 12213211555380554371, 386215660604902322908
OFFSET
1,2
EXAMPLE
a(6) = floor[ sqrt{149162536}] = 12213.
CROSSREFS
Sequence in context: A133553 A010571 A280248 * A208937 A209065 A124153
KEYWORD
easy,nonn,base
AUTHOR
Amarnath Murthy, Jan 08 2002
EXTENSIONS
Edited by Charles R Greathouse IV, Apr 27 2010
STATUS
approved