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

%I #10 Mar 02 2023 13:57:43

%S 32,1062,59616,1086094,10042272,61124544,280188272,1045829432,

%T 3339944928,9435994838,24147340800,56953687086,125443556992,

%U 260657649336,515094590448,974349778400,1773602460704,3120448646646,5325900683168

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

%H R. H. Hardin, <a href="/A159360/b159360.txt">Table of n, a(n) for n=3..27</a>

%F 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

%K nonn

%O 3,1

%A _R. H. Hardin_, Apr 11 2009

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Last modified June 22 23:47 EDT 2024. Contains 373629 sequences. (Running on oeis4.)