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

Author

R. H. Hardin, Apr 11 2009

Keywords

• nonn

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