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A141136
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a(n) = prime(prime(A028815(n) - 1) - 1) - 1.
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6
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1, 2, 6, 28, 52, 112, 172, 270, 316, 420, 592, 700, 910, 1060, 1150, 1290, 1510, 1782, 1830, 2212, 2376, 2472, 2740, 2998, 3256, 3630, 3930, 4078, 4270, 4390, 4546, 5350, 5590, 5866, 6100, 6658, 6802, 7186, 7602, 7828, 8218, 8520, 8712, 9310, 9438, 9732
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graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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0,2
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LINKS
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FORMULA
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MATHEMATICA
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A141136[n_]:= With[{p=Prime}, If[n==0, 1, p[p[p[n]]-1]-1]];
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PROG
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(Magma)
p:=NthPrime;
A141136:= func< n | n eq 0 select 1 else p(p(p(n))-1) -1 >;
(SageMath)
p=nth_prime
def A141136(n): return 1 if n==0 else p(p(p(n))-1)-1
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CROSSREFS
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KEYWORD
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nonn,changed
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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