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Search: id:A141619
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A141619 a(n) = 3*(n+1)/2 if n is odd, a(n) = prime(n/2) if n is even. +0
2
3, 2, 6, 3, 9, 5, 12, 7, 15, 11, 18, 13, 21, 17, 24, 19, 27, 23, 30, 29, 33, 31, 36, 37, 39, 41, 42, 43, 45, 47, 48, 53, 51, 59, 54, 61, 57, 67, 60, 71, 63, 73, 66, 79, 69, 83, 72, 89, 75, 97, 78, 101, 81, 103, 84, 107, 87, 109, 90, 113, 93, 127, 96, 131, 99, 137, 102, 139, 105, 149 (list; graph; listen)
OFFSET

1,1

MATHEMATICA

f[n_] := If[OddQ@n, 3 (n + 1)/2, Prime[n/2]]; Array[f, 70] [From Robert G. Wilson v (rgwv(AT)rgwv.com), Sep 22 2008]

CROSSREFS

Sequence in context: A038572 A060992 A064455 this_sequence A065021 A048652 A057050

Adjacent sequences: A141616 A141617 A141618 this_sequence A141620 A141621 A141622

KEYWORD

nonn

AUTHOR

Marina (kiev.marina(AT)gmail.com), Aug 23 2008

EXTENSIONS

Definition found by Alexander Povolotsky (apovolot(AT)gmail.com), Aug 26 2008

More terms based on Alexander Povolotsky's definition from njas, Aug 27 2008

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Last modified December 2 15:58 EST 2008. Contains 150992 sequences.


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