login
This site is supported by donations to The OEIS Foundation.
Logo

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A077432 Squares of the form u'v'w, where in decimal representation u=n^2, v=2*n^2 and w=n^2 possibly with a leading zero. 3
121, 484, 91809, 163216, 255025, 367236, 499849, 64128064, 81162081, 100200100, 121242121, 144288144, 169338169, 196392196, 225450225, 256512256, 289578289, 324648324, 361722361, 400800400, 441882441, 484968484, 52910580529 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

COMMENTS

a(n) = A077431(n)^2.

FORMULA

(n*(1+10^(1+floor(Log10(2*n^2)))))^2.

EXAMPLE

n=42, n^2=1764 and 2*n^2=3528: a(42) = 1764'3528'1764 = 420042^2 = A077431(42)^2.

CROSSREFS

Cf. A004216, A077430.

Sequence in context: A062555 A017390 A110722 * A017654 A183448 A204034

Adjacent sequences:  A077429 A077430 A077431 * A077433 A077434 A077435

KEYWORD

nonn,base,nice

AUTHOR

Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Nov 05 2002

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Puzzles | Hot | Classics
Recent Additions | More pages | Superseeker | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement .

Last modified February 17 09:16 EST 2012. Contains 206009 sequences.