A375502 a(n) is the minimal number of parallel straight lines needed to intersect all points (k, prime(k)) for k = 1..n (where prime(k) denotes the k-th prime number).

1, 1, 2, 2, 3, 3, 4, 4, 4, 4, 5, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 7, 7, 7, 7, 7, 7, 8, 8, 9, 9, 10, 11, 11, 12, 12, 13, 14, 14, 15, 16, 16, 16, 17, 18, 18, 19, 19, 19, 19, 20, 21, 21, 22, 22, 22, 22, 22, 22, 23, 24, 25, 25, 26, 26, 26, 26, 26, 26, 26, 26

Offset

1,3

Links

Rémy Sigrist, Table of n, a(n) for n = 1..1000

Rémy Sigrist, PARI program

Prog

(PARI) \\ See Links section.

Crossrefs

Cf. A373811, A375433, A373813.

Sequence in context: A061070 A285879 A117695 * A074794 A234309 A306921

Adjacent sequences: A375499 A375500 A375501 * A375503 A375504 A375505

Keyword

nonn

Author

Rémy Sigrist, Aug 18 2024

Status

approved