A159409 Number of n X n arrays of squares of integers summing to 22.

24, 8064, 5037600, 3174009200, 1882950151680, 899220266678944, 309189853885141152, 70127950221363153600, 10010731525034640878800, 907457680142781736880560, 54692309643517397134557792, 2316866493981973489812610432, 72620271578582971583471226760

Offset

2,1

Comments

All such sequences have holonomic recurrences (cf. comment in A159359). - Georg Fischer, Feb 17 2022

Links

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

Vaclav Kotesovec, G.f. for A159409

Index entries for linear recurrences with constant coefficients, signature (45, -990, 14190, -148995, 1221759, -8145060, 45379620, -215553195, 886163135, -3190187286, 10150595910, -28760021745, 73006209045, -166871334960, 344867425584, -646626422970, 1103068603890, -1715884494940, 2438362177020, -3169870830126, 3773655750150, -4116715363800, 4116715363800, -3773655750150, 3169870830126, -2438362177020, 1715884494940, -1103068603890, 646626422970, -344867425584, 166871334960, -73006209045, 28760021745, -10150595910, 3190187286, -886163135, 215553195, -45379620, 8145060, -1221759, 148995, -14190, 990, -45, 1).

Formula

G.f.: see link above. - Vaclav Kotesovec, Dec 04 2012

Crossrefs

Sequence in context: A158042 A297049 A147860 * A167824 A266658 A065142

Adjacent sequences: A159406 A159407 A159408 * A159410 A159411 A159412

Keyword

nonn

Author

R. H. Hardin, Apr 11 2009

Status

approved