A159403 Number of n X n arrays of squares of integers summing to 19.

16, 6300, 2313824, 958814800, 344874634776, 94238931103688, 17587610284856640, 2081480274802819080, 154433611467392996200, 7500926051791640560840, 253440319439897133594336, 6305930304447589335730756

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 A159403

Index entries for linear recurrences with constant coefficients, signature (39, -741, 9139, -82251, 575757, -3262623, 15380937, -61523748, 211915132, -635745396, 1676056044, -3910797436, 8122425444, -15084504396, 25140840660, -37711260990, 51021117810, -62359143990, 68923264410, -68923264410, 62359143990, -51021117810, 37711260990, -25140840660, 15084504396, -8122425444, 3910797436, -1676056044, 635745396, -211915132, 61523748, -15380937, 3262623, -575757, 82251, -9139, 741, -39, 1).

Formula

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

Crossrefs

Sequence in context: A181028 A258583 A337796 * A221199 A017008 A097547

Adjacent sequences: A159400 A159401 A159402 * A159404 A159405 A159406

Keyword

nonn

Author

R. H. Hardin, Apr 11 2009

Status

approved