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A087747 Least number expressible as a sum of two distinct primes in exactly n ways. +0
1
5, 16, 24, 36, 48, 60, 78, 84, 90, 114, 144, 120, 168, 180, 234, 246, 288, 300, 360, 474, 330, 528, 576, 390, 462, 480, 420, 570, 510, 672, 792, 756, 876, 714, 798, 690, 1038, 630, 1008, 930, 780, 960, 870, 924, 900, 1134, 1434, 840, 990, 1302, 1080, 1230, 1518 (list; graph; listen)
OFFSET

1,1

EXAMPLE

a(2)=16 because we have 16=3+13=5+11,followed by 18=5+13=7+11;20=3+17=7+13;24=5+19=11+13;26=3+23=7+19;...

CROSSREFS

Sequence in context: A029450 A063232 A063243 this_sequence A090785 A069482 A102045

Adjacent sequences: A087744 A087745 A087746 this_sequence A087748 A087749 A087750

KEYWORD

nonn

AUTHOR

Lekraj Beedassy (blekraj(AT)yahoo.com), Oct 02 2003

EXTENSIONS

More terms from John Dethridge (jcd(AT)ms.unimelb.edu.au), Jan 08 2004

More terms from Hugo Pfoertner (hugo(AT)pfoertner.org), Sep 23 2004

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Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.


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