Numerator of Product_{k=1..n} (2k/(2k+1))^((-1)^A000120(k)).

A261505

Numerator of Product_{k=1..n} (2k/(2k+1))^((-1)^A000120(k)).

Terms

    a(0) =3a(1) =15a(2) =45a(3) =405a(4) =2025a(5) =6075a(6) =91125a(7) =1549125a(8) =13942125a(9) =23236875a(10) =534448125a(11) =64133775a(12) =1731611925a(13) =50216745825a(14) =753251187375

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