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A152018
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Denominator of 1/n^2-1/(3n)^2 or of 8/(9n^2).
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1
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9, 9, 81, 18, 225, 81, 441, 72, 729, 225, 1089, 162, 1521, 441, 2025, 288, 2601, 729, 3249, 450, 3969, 1089, 4761, 648, 5625, 1521, 6561, 882, 7569, 2025, 8649, 1152, 9801, 2601, 11025, 1458, 12321, 3249, 13689, 1800, 15129, 3969, 16641, 2178, 18225
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OFFSET
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1,1
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COMMENTS
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All numbers are multiples of 9.
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LINKS
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Index entries for linear recurrences with constant coefficients, signature (0, 0, 0, 3, 0, 0, 0, -3, 0, 0, 0, 1).
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FORMULA
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MATHEMATICA
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CROSSREFS
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Cf. A143025 with a similar principle of construction.
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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Stratified definition, corrected indices, extended, R. J. Mathar, Dec 10 2008
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STATUS
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approved
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