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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A156440 Number of nXn arrays of squares of integers, symmetric about main diagonal, with all rows summing to 6. 0
4, 42, 552, 13751, 425674, 18458342, 1164072896, 139921844820, 38221283215416, 19223028387830564, 13952451706754445456 (list; graph; refs; listen; history; text; internal format)
OFFSET

3,1

LINKS

Table of n, a(n) for n=3..13.

CROSSREFS

Sequence in context: A085954 A046719 A092800 * A151453 A234507 A153854

Adjacent sequences:  A156437 A156438 A156439 * A156441 A156442 A156443

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 09 2009

STATUS

approved

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

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

Last modified October 22 02:54 EDT 2014. Contains 248382 sequences.