login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A156478
Number of n X n arrays of squares of integers, symmetric about both diagonal and antidiagonal, with all rows summing to 22.
0
2, 44, 40, 7838, 31206, 5100574, 62202832, 23258023832, 999916709280, 912189500014368
(
list
;
graph
;
refs
;
listen
;
history
;
text
;
internal format
)
OFFSET
3,1
LINKS
Table of n, a(n) for n=3..12.
CROSSREFS
Sequence in context:
A362762
A177490
A203498
*
A156508
A239865
A007367
Adjacent sequences:
A156475
A156476
A156477
*
A156479
A156480
A156481
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
|
Recents
The OEIS Community
| Maintained by
The OEIS Foundation Inc.
License Agreements, Terms of Use, Privacy Policy.
.
Last modified March 28 17:42 EDT 2024. Contains 371254 sequences. (Running on oeis4.)