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0, 25, 9, 441, 4, 2025, 225, 5929, 36, 13689, 1225, 27225, 144, 48841, 3969, 81225, 400, 127449, 9801, 190969, 900, 275625, 20449, 385641, 1764, 525625, 38025, 700569, 3136, 915849, 65025, 1177225, 5184, 1490841, 104329, 1863225, 8100
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OFFSET
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2,2
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COMMENTS
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A061038(n)/a(n+2) for n >= 2 gives the reduced fractions 1/9, 4/49, 4, 4/81, 1/25, 4/121, 16/9, 4/169, ...
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LINKS
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FORMULA
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Sum_{n>=3} 1/a(n) = 79*Pi^2/192 - 65/18. - Amiram Eldar, Aug 14 2022
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MATHEMATICA
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PROG
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(PARI) a(n) = numerator((n-2)*(n+2)/(4*n^2));
for(n=2, 100, print1(a(n)^2, ", ")) \\ G. C. Greubel, Sep 19 2018
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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