A159360 Number of n X n arrays of squares of integers with every (n-1) X (n-1) subblock summing to 5.

32, 1062, 59616, 1086094, 10042272, 61124544, 280188272, 1045829432, 3339944928, 9435994838, 24147340800, 56953687086, 125443556992, 260657649336, 515094590448, 974349778400, 1773602460704, 3120448646646, 5325900683168

Offset

3,1

Links

R. H. Hardin, Table of n, a(n) for n=3..27

Formula

Empirical G.f.: 2*x^3*(-16 - 355*x - 24847*x^2 - 241724*x^3 - 604724*x^4 - 446879*x^5 - 67579*x^6 + 9004*x^7 + 940*x^8 + 8*x^9)/(-1+x)^11. - Vaclav Kotesovec, Nov 30 2012

Crossrefs

Sequence in context: A041481 A158685 A265021 * A249392 A114933 A038097

Adjacent sequences: A159357 A159358 A159359 * A159361 A159362 A159363

Keyword

nonn

Author

R. H. Hardin, Apr 11 2009

Status

approved