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A155477
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a(n) = 43^(2*n+1).
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2
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43, 79507, 147008443, 271818611107, 502592611936843, 929293739471222707, 1718264124282290785243, 3177070365797955661914307, 5874403106360420018879553643, 10861771343660416614908294685907, 20083415214428110320965436874242043
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OFFSET
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0,1
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COMMENTS
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43*a(n) is a square, hence also a(n)^3+(6*a(n))^3+(11*a(n))^3 = 36*43*a(n)^3 is a square.
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LINKS
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FORMULA
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MATHEMATICA
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PROG
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(PARI) vector(20, n, n--; 43^(2*n+1)) \\ Altug Alkan, Oct 01 2015
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CROSSREFS
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Bisection of A009987 (powers of 43).
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KEYWORD
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nonn,easy
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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