The OEIS mourns the passing of Jim Simons and is grateful to the Simons Foundation for its support of research in many branches of science, including the OEIS.
login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A159221 1/2 the number of n X n arrays of squares of integers with every 2X2 subblock summing to 20 0
9, 23, 49, 101, 201, 401, 793, 1577, 3129, 6233, 12409, 24761, 49401, 98681, 197113, 393977, 787449, 1574393, 3147769, 6294521, 12587001, 25171961, 50339833, 100675577, 201342969, 402677753, 805339129 (list; graph; refs; listen; history; text; internal format)
OFFSET
2,1
COMMENTS
Same series for 1/2 the number of n X n arrays of squares of integers with every 2X2 subblock summing to 10
LINKS
CROSSREFS
Sequence in context: A363161 A183453 A296311 * A079040 A183338 A212676
KEYWORD
nonn
AUTHOR
R. H. Hardin Apr 06 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 June 17 20:03 EDT 2024. Contains 373464 sequences. (Running on oeis4.)