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A156643 Number of decompositions of 4n+2 into unordered sums of two primes of the form 4k+1 +0
1
0, 0, 1, 0, 1, 1, 1, 1, 2, 0, 2, 2, 1, 2, 3, 0, 3, 2, 2, 3, 2, 1, 3, 2, 1, 4, 3, 2, 5, 3, 2, 5, 4, 2, 3, 4, 2, 5, 4, 1, 5, 3, 3, 4, 4, 1, 6, 4, 3 (list; graph; listen)
OFFSET

0,9

COMMENT

a(n)=A002375(n)-A156642(n). Conjecture. For sufficiently large n, a(n)>0.

CROSSREFS

A002144 A156642 A002375 A061358 A002372 A045917

Sequence in context: A118206 A029314 A071635 this_sequence A128664 A003823 A059451

Adjacent sequences: A156640 A156641 A156642 this_sequence A156644 A156645 A156646

KEYWORD

nonn

AUTHOR

Vladimir Shevelev (shevelev(AT)bgu.ac.il), Feb 12 2009

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Last modified November 27 14:34 EST 2009. Contains 167570 sequences.


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