A099090 a(n) = A004491(n)/2^(2n+1).
1, 1, 28, 42386176, 193887869660028067003488010240
Offset: 0
Keywords
Crossrefs
Cf. A004491.
This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
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