Logo

Greetings from The On-Line Encyclopedia of Integer Sequences!

Hints

Search: id:A156438
Displaying 1-1 of 1 results found. page 1
     Format: long | short | internal | text      Sort: relevance | references | number      Highlight: on | off
A156438 Number of nXn arrays of squares of integers, symmetric about both diagonal and antidiagonal, with all rows summing to 5. +0
1
2, 0, 22, 7, 232, 270, 9312, 40416, 1578064, 10491480, 534495232, 4186295040, 266388662656, 2380048630848, 182963339479264, 1839487795001024, 166774503916789696, 1865501254974930048, 195842622547532763968 (list; graph; listen)
OFFSET

2,1
CROSSREFS

Sequence in context: A152154 A009198 A139003 this_sequence A009378 A106708 A138551

Adjacent sequences: A156435 A156436 A156437 this_sequence A156439 A156440 A156441

KEYWORD

nonn

AUTHOR

Ron Hardin (rhhardin(AT)att.net) Feb 09 2009

page 1

Search completed in 0.002 seconds

Lookup | Welcome | Find friends | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Puzzles | Hot | Classics
More pages | Superseeker | Maintained by N. J. A. Sloane (njas@research.att.com)

Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

AT&T Labs Research

Legal Notice
© 2009 AT&T Intellectual Property. All Rights Reserved.