A159399 Number of n X n arrays of squares of integers summing to 17.

24, 3987, 1329600, 393183300, 97392158640, 17599403987109, 2090745760711104, 154645022410543575, 7276569286821991200, 231629029897909307070, 5317957812543381124416, 92961980659920993199761, 1292040135734007389094120, 14775339909152109112978950

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 A159399

Index entries for linear recurrences with constant coefficients, signature (35, -595, 6545, -52360, 324632, -1623160, 6724520, -23535820, 70607460, -183579396, 417225900, -834451800, 1476337800, -2319959400, 3247943160, -4059928950, 4537567650, -4537567650, 4059928950, -3247943160, 2319959400, -1476337800, 834451800, -417225900, 183579396, -70607460, 23535820, -6724520, 1623160, -324632, 52360, -6545, 595, -35, 1).

Formula

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

Crossrefs

Sequence in context: A357266 A166768 A326120 * A184687 A007241 A106207

Adjacent sequences: A159396 A159397 A159398 * A159400 A159401 A159402

Keyword

nonn

Author

R. H. Hardin, Apr 11 2009

Status

approved