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A193181
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a(n) = lcm(f(1),f(2),...,f(n)) with f(x) = x^2+1.
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3
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2, 10, 10, 170, 2210, 81770, 408850, 408850, 16762850, 1693047850, 103275918850, 2995001646650, 2995001646650, 590015324390050, 66671731656075650, 17134635035611442050, 17134635035611442050, 17134635035611442050, 3101368941445671011050
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OFFSET
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1,1
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COMMENTS
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log(a(n)) = n*log(n)+B*n+o(n); B=-0.066275634213060706383563177025.
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LINKS
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MAPLE
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a[0]:= 1:
for n from 1 to 30 do a[n]:= ilcm(a[n-1], n^2+1) od:
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MATHEMATICA
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f[x_] := x^2+1; a[1] = f[1]; a[n_] := a[n] = LCM[f[n], a[n-1]]; Table[a[n], {n, 20}]
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PROG
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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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