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

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A156455 Number of nXn arrays of squares of integers, symmetric about main diagonal, with all rows summing to 12. 0
1, 20, 352, 17550, 2246390, 991288522, 781505368112, 976681206480324, 1865446774685049420 (list; graph; refs; listen; history; internal format)
OFFSET

3,2

CROSSREFS

Sequence in context: A167031 A005748 A093144 * A089350 A004292 A053508

Adjacent sequences:  A156452 A156453 A156454 * A156456 A156457 A156458

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 16 02:30 EST 2012. Contains 205860 sequences.