login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A156507 Number of n X n arrays of squares of integers, symmetric about both diagonal and antidiagonal, with all rows summing to 43. 0
2, 58, 204, 41816, 422538, 169361504, 5201763072, 5719198097600 (list; graph; refs; listen; history; text; internal format)
OFFSET

3,1

LINKS

Table of n, a(n) for n=3..10.

CROSSREFS

Sequence in context: A104494 A121931 A343578 * A285148 A115610 A341082

Adjacent sequences:  A156504 A156505 A156506 * A156508 A156509 A156510

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 | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified May 7 19:23 EDT 2021. Contains 343652 sequences. (Running on oeis4.)