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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 (list; graph; refs; listen; history; internal format)
OFFSET

1,5

CROSSREFS

Sequence in context: A094451 A056562 A135220 * A111330 A117447 A053250

Adjacent sequences:  A068317 A068318 A068319 * A068321 A068322 A068323

KEYWORD

easy,nonn

AUTHOR

Naohiro Nomoto (n_nomoto(AT)yabumi.com), Feb 27 2002

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Last modified February 16 21:51 EST 2012. Contains 205978 sequences.