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A087187 Number of ways to write n = i*p + j*q, where (p,q) is a twin prime pair and i,j>0. 0
0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 1, 1, 1, 0, 1, 2, 1, 2, 1, 1, 2, 2, 3, 1, 3, 2, 2, 3, 1, 3, 3, 3, 3, 3, 4, 4, 4, 3, 3, 4, 3, 4, 4, 3, 5, 5, 5, 4, 5, 4, 5, 6, 5, 5, 5, 6, 5, 7, 5, 7, 6, 6, 6, 5, 6, 6, 8, 6, 7, 7, 8, 7, 9, 6, 8, 7, 7, 8, 7, 8, 8, 9, 8, 8, 8, 10, 8, 12, 8, 10, 10, 9, 10, 8, 10, 9, 10, 9 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,17
COMMENTS
a(A054735(n)) > 0.
LINKS
Eric Weisstein's World of Mathematics, Prime Partition
EXAMPLE
n=50 = 5+5+5+5+5+5+5+3+3+3+3+3 = 5+5+5+5+3+3+3+3+3+3+3+3+3+3 =
5+3+3+3+3+3+3+3+3+3+3+3+3+3+3+3 = 7+7+7+7+7+5+5+5 = 13+13+13+11, therefore
a(50)=5
CROSSREFS
Sequence in context: A298674 A211354 A211352 * A029380 A298485 A332997
KEYWORD
nonn
AUTHOR
Reinhard Zumkeller, Aug 23 2003
STATUS
approved

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Last modified February 22 22:43 EST 2024. Contains 370265 sequences. (Running on oeis4.)