[math-fun] Re: some puzzle sequences not in OEIS!
16 Jun
2003
16 Jun
'03
8:18 a.m.
17: 36, 864, 21060, 544320, ? If we index starting at 1, we have a(n) = a(n-1) ((n+10)(9n-12)/(5n-7)). This gives ? = 14968800. However, the subsequent term is noninteger. Yeah, it's ugly, what can I say.
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David Wilson