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URL: https://oeis.org/A068320

⇱ A068320 - OEIS


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A068320
a(n)=number of arithmetic progressions of primes, strictly increasing with sum n.
0
0, 1, 1, 0, 2, 0, 2, 1, 1, 1, 1, 1, 2, 1, 2, 2, 1, 2, 2, 2, 2, 2, 1, 3, 1, 2, 0, 2, 1, 3, 2, 2, 3, 3, 0, 4, 1, 1, 3, 3, 1, 4, 2, 3, 1, 3, 1, 5, 1, 4, 3, 3, 1, 5, 1, 4, 1, 3, 1, 6, 2, 2, 1, 5, 0, 6, 1, 2, 4, 5, 1, 6, 2, 4, 1, 5, 0, 7, 1, 5, 1, 4, 1, 8, 2, 4, 3, 4, 1, 9, 1, 5, 2, 4, 0, 7, 1
OFFSET
1,5
CROSSREFS
Sequence in context: A280008 A135220 A347550 * A111330 A225152 A117447
KEYWORD
easy,nonn
AUTHOR
Naohiro Nomoto, Feb 27 2002
STATUS
approved