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!)
A159383 Number of n X n arrays of squares of integers summing to 11 1
12, 1584, 152688, 13648200, 846679356, 32762864904, 779081474880, 12381739674840, 143119261158300, 1283949949655736, 9379210663695600, 57819891720389760, 309087991429311276, 1463326913027026800 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,1

LINKS

R. H. Hardin, Table of n, a(n) for n=2..100

FORMULA

Empirical G.f.: -12*x^2*(1+x)*(1 + 108*x + 9833*x^2 + 866490*x^3 + 46525328*x^4 + 1327261872*x^5 + 16745609840*x^6 + 97277340534*x^7 + 275802359702*x^8 + 390874554984*x^9 + 275802359702*x^10 + 97277340534*x^11 + 16745609840*x^12 + 1327261872*x^13 + 46525328*x^14 + 866490*x^15 + 9833*x^16 + 108*x^17 + x^18)/(-1+x)^23. - Vaclav Kotesovec, Nov 30 2012

CROSSREFS

Sequence in context: A160237 A013474 A013515 * A015011 A271435 A271436

Adjacent sequences:  A159380 A159381 A159382 * A159384 A159385 A159386

KEYWORD

nonn

AUTHOR

R. H. Hardin Apr 11 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 August 14 03:05 EDT 2020. Contains 336477 sequences. (Running on oeis4.)