The On-Line Encyclopedia of Integer Sequences (OEIS)

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A067124

Floor [sqrt{concatenation of first n squares}].
(history; published version)

#4 by N. J. A. Sloane at Thu Dec 05 19:55:08 EST 2013

AUTHOR

_Amarnath Murthy (amarnath_murthy(AT)yahoo.com), _, Jan 08 2002

Discussion

Thu Dec 05

19:55

OEIS Server: https://oeis.org/edit/global/2075

#3 by Russ Cox at Fri Mar 30 17:28:17 EDT 2012

EXTENSIONS

Edited by _Charles R Greathouse IV (charles.greathouse(AT)case.edu), _, Apr 27 2010

Discussion

Fri Mar 30

17:28

OEIS Server: https://oeis.org/edit/global/147

#2 by N. J. A. Sloane at Tue Jun 01 03:00:00 EDT 2010

KEYWORD

easy,nonn,base,new

EXTENSIONS

Edited by Charles R Greathouse IV (charles.greathouse(AT)case.edu), Apr 27 2010

#1 by N. J. A. Sloane at Fri May 16 03:00:00 EDT 2003

NAME

Floor [sqrt{concatenation of first n squares}].

DATA

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.

KEYWORD

easy,nonn

AUTHOR

Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Jan 08 2002

STATUS

approved