A068323 a(n)=number of arithmetic progressions of primes, nondecreasing with sum n.

0, 1, 1, 1, 2, 2, 2, 2, 2, 3, 1, 3, 2, 3, 4, 3, 1, 4, 2, 4, 4, 4, 1, 5, 2, 4, 1, 4, 1, 6, 2, 3, 5, 5, 2, 6, 1, 3, 5, 5, 1, 7, 2, 5, 3, 5, 1, 7, 2, 6, 5, 5, 1, 7, 3, 6, 3, 5, 1, 9, 2, 4, 3, 6, 2, 9, 1, 4, 6, 8, 1, 8, 2, 6, 3, 7, 2, 10, 1, 7, 2, 6, 1, 11, 4, 6

Offset

1,5

Links

Table of n, a(n) for n=1..86.

Crossrefs

Sequence in context: A330955 A330956 A190617 * A054990 A046921 A262954

Adjacent sequences: A068320 A068321 A068322 * A068324 A068325 A068326

Keyword

easy,nonn

Author

Naohiro Nomoto, Feb 27 2002

Extensions

More terms from Sean A. Irvine, Feb 09 2024

Status

approved