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A075076
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Integers pertaining to A075075: a(n) = b(n-1)*b(n+1)/b(n) where b(n) is the n-th term of A075075.
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3
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2, 3, 2, 10, 6, 4, 15, 6, 20, 12, 12, 30, 12, 28, 6, 33, 14, 7, 44, 13, 14, 34, 26, 15, 51, 18, 55, 36, 24, 55, 20, 56, 30, 30, 56, 39, 36, 68, 52, 42, 85, 40, 77, 60, 45, 77, 42, 99, 56, 56, 99, 72, 80, 54, 57, 30, 46, 38, 29, 23, 62, 58, 37, 31, 82, 74, 38, 123, 38, 86, 114, 39
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OFFSET
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2,1
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COMMENTS
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This is not a permutation of the natural numbers since a(4)=a(2), a(9)=a(6), a(12)=a(11) etc. [From Hagen von Eitzen, May 16 2009]
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LINKS
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Alois P. Heinz, Table of n, a(n) for n = 2..10000
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MAPLE
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c:= proc() false end:
b:= proc(n) option remember; local k, m;
if n<3 then k:=n
else m:= denom (b(n-2) /b(n-1));
for k from m by m while c(k) do od
fi;
c(k):= true; k
end:
a:= n-> b(n-1)*b(n+1)/b(n):
seq (a(n), n=2..100); # Alois P. Heinz, Jul 18 2012
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CROSSREFS
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Cf. A075075.
Sequence in context: A126286 A126288 A205393 * A078828 A224418 A220947
Adjacent sequences: A075073 A075074 A075075 * A075077 A075078 A075079
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KEYWORD
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nonn
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AUTHOR
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Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Sep 09 2002
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EXTENSIONS
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More terms from Sascha Kurz, Feb 03 2003
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STATUS
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approved
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