id:A159355 - OEIS Search Results

Search: id:A159355

Displaying 1-1 of 1 results found.

page 1

Number of nXn arrays of squares of integers summing to 4

+0
1

5, 135, 1836, 12675, 58941, 211925, 635440, 1663821, 3921325, 8495531, 17179020, 32795295, 59626581, 103962825, 174792896, 284660665, 450710325, 695946991, 1050740300, 1554600411, 2258257485, 3226077405, 4538848176, 6296973125 (list; graph; listen)

	OFFSET	`2,1`
	LINKS	`R. H. Hardin, Table of n, a(n) for n=2..100`
	FORMULA	`Empirical: n^2(n^2+1)(n^4-7*n^2+18)/24. [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Aug 11 2009]`
	CROSSREFS	`Sequence in context: A114474 A085506 A132508 this_sequence A082212 A094808 A061453` `Adjacent sequences: A159352 A159353 A159354 this_sequence A159356 A159357 A159358`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net) Apr 11 2009`

page 1

Search completed in 0.002 seconds

Last modified December 18 21:37 EST 2009. Contains 171024 sequences.

AT&T Labs Research