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A159381
Number of n X n arrays of squares of integers with every (n-2) X (n-2) subblock summing to 10.
1
98, 39776, 30091200, 9401745272, 1515384378466, 95800979329752, 2928316303055152, 53344688287016072, 663945041894867938, 6175076522911203760, 45628666065434624608, 279828063504222635456
OFFSET
4,1
LINKS
Robert Israel, Table of n, a(n) for n = 4..1000 (n = 4..16 from R. H. Hardin)
Robert Israel, Maple code
Index entries for linear recurrences with constant coefficients, signature (21, -210, 1330, -5985, 20349, -54264, 116280, -203490, 293930, -352716, 352716, -293930, 203490, -116280, 54264, -20349, 5985, -1330, 210, -21, 1).
FORMULA
a(n) = (193615195381*n^20 - 11890249696380*n^19 + 334659414495095*n^18 - 5677041092927040*n^17 + 63919508461019886*n^16 - 490567367412102600*n^15 + 2454438201119451790*n^14 - 5954068345650210480*n^13 - 16667311860006023119*n^12 + 234630414328706946180*n^11 - 1155278177315230629765*n^10 + 3295924981701212800080*n^9 - 4739319231079836161444*n^8 - 3101677426623769307040*n^7 + 32737046640480892867280*n^6 - 80257709497584914242560*n^5 + 108041556400340336479296*n^4 - 79380002767630028060160*n^3 + 19466967995225957145600*n^2 + 11192785335139968000000*n - 6168943104452352000000)/1646023680000. - Robert Israel, Dec 19 2023
MAPLE
# See uploaded file.
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Apr 11 2009
STATUS
approved