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

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A156468 Number of nXn arrays of squares of integers, symmetric about main diagonal, with all rows summing to 18. 0
1, 8, 114, 3704, 285470, 46859304, 17604991124, 15033533213232, 35207864619957092 (list; graph; refs; listen; history; internal format)
OFFSET

2,2

CROSSREFS

Sequence in context: A023814 A062126 A113670 * A056988 A085699 A046914

Adjacent sequences:  A156465 A156466 A156467 * A156469 A156470 A156471

KEYWORD

nonn

AUTHOR

R. H. Hardin (rhhardin(AT)att.net) Feb 09 2009

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 14 10:43 EST 2012. Contains 205614 sequences.